M\u1ecdi ng\u01b0\u1eddi \u0111\u1ec1u c\u00f3 th\u1ec3 nh\u1eadn th\u1ea5y hi\u1ec7n t\u01b0\u1ee3ng: vi\u00ean g\u1ea1ch n\u1eb1m ngang r\u1ea5t \u1ed5n \u0111\u1ecbnh, d\u1ef1ng n\u00f3 \u0111\u1ee9ng th\u1eb3ng l\u00ean th\u00ec r\u1ea5t d\u1ec5 b\u1ecb \u0111\u1ed5 nh\u00e0o; c\u00e1i chai \u0111\u1ef1ng n\u1eeda chai n\u01b0\u1edbc \u0111\u1eb7t \u0111\u1ee9ng tr\u00ean m\u1eb7t \u0111\u1ea5t b\u1eb1ng ph\u1eb3ng th\u00ec r\u1ea5t \u1ed5n \u0111\u1ecbnh, chai kh\u00f4ng ho\u1eb7c chai \u0111\u1ef1ng \u0111\u1ea7y n\u01b0\u1edbc th\u00ec t\u01b0\u01a1ng \u0111\u1ed1i d\u1ec5 b\u1ecb l\u1eadt nh\u00e0o. T\u1eeb hai s\u1ef1 vi\u1ec7c k\u1ec3 tr\u00ean, c\u00f3 th\u1ec3 th\u1ea5y, mu\u1ed1n cho m\u1ed9t v\u1eadt th\u1ec3 \u1ed5n \u0111\u1ecbnh, kh\u00f4ng d\u1ec5 b\u1ecb l\u1eadt \u0111\u1ed5 th\u00ec c\u1ea7n ph\u1ea3i tho\u1ea3 m\u00e3n hai \u0111i\u1ec1u ki\u1ec7n: m\u1ed9t l\u00e0 di\u1ec7n t\u00edch \u0111\u00e1y c\u1ee7a n\u00f3 ph\u1ea3i l\u1edbn; hai l\u00e0 s\u1ee9c n\u1eb7ng c\u1ee7a n\u00f3ph\u1ea3i c\u1ed1 t\u1eadp trung v\u00e0o ph\u1ea7n d\u01b0\u1edbi, n\u00f3i c\u00e1ch kh\u00e1c l\u00e0 tr\u1ecdng t\u00e2m c\u1ee7a n\u00f3 ph\u1ea3i th\u1ea5p. Tr\u1ecdng t\u00e2m c\u1ee7a v\u1eadt th\u1ec3 c\u00f3 th\u1ec3 xem l\u00e0 \u0111i\u1ec3m t\u00e1c \u0111\u1ed9ng h\u1ee3p l\u1ef1c c\u1ee7a tr\u1ecdng l\u1ef1c \u0111\u1eb7t l\u00ean \u0111\u1ea5y.<\/p>\n\n\n\n
\u0110\u1ed1i v\u1edbi b\u1ea5t k\u00ec v\u1eadt th\u1ec3 n\u00e0o, n\u1ebfu di\u1ec7n t\u00edch \u0111\u00e1y c\u1ee7a n\u00f3 c\u00e0ng l\u1edbn, tr\u1ecdng t\u00e2m c\u00e0ng th\u1ea5p th\u00ec n\u00f3 c\u00e0ng \u1ed5n \u0111\u1ecbnh, c\u00e0ng kh\u00f3 b\u1ecb \u0111\u1ed5 nh\u00e0o. V\u00ed d\u1ee5: c\u00e1c ki\u1ebfn tr\u00fac h\u00ecnh th\u00e1p bao gi\u1edd c\u0169ng l\u00e0 b\u00ean d\u01b0\u1edbi ph\u00ecnh, b\u00ean tr\u00ean nh\u1ecdn, khi x\u1ebfp h\u00e0ng ho\u00e1 v\u1eadn chuy\u1ec3n bao gi\u1edd c\u0169ng \u0111\u1eb7t v\u1eadt n\u1eb7ng xu\u1ed1ng d\u01b0\u1edbi, v\u1eadt nh\u1eb9 l\u00ean tr\u00ean.<\/p>\n\n\n\n
N\u1eafm \u0111\u01b0\u1ee3c c\u00e1c ki\u1ebfn th\u1ee9c \u0111\u00f3 r\u1ed3i, ch\u00fang ta h\u00e3y quay l\u1ea1i xem x\u00e9t con l\u1eadt \u0111\u1eadt. To\u00e0n b\u1ed9 th\u00e2n m\u00ecnh con l\u1eadt \u0111\u1eadt \u0111\u1ec1u r\u1ea5t nh\u1eb9, song \u1edf \u0111\u00e1y c\u1ee7a n\u00f3 c\u00f3 m\u1ed9t c\u1ee5c ch\u00ec ho\u1eb7c c\u1ee5c s\u1eaft h\u01a1i n\u1eb7ng, v\u00ec v\u1eady tr\u1ecdng t\u00e2m c\u1ee7a n\u00f3 r\u1ea5t. M\u1eb7t kh\u00e1c, m\u1eb7t \u0111\u00e1y c\u1ee7a con l\u1eadt \u0111\u1eadt l\u1edbn m\u00e0 tr\u00f2n nh\u1eb5n, d\u1ec5 \u0111ung \u0111\u01b0a. Khi con l\u1eadt \u0111\u1eadt nghi\u00eang l\u1ec7ch v\u1ec1 m\u1ed9t ph\u00eda, do \u0111i\u1ec3m t\u1ef1a (\u0111i\u1ec3m ti\u1ebfp x\u00fac c\u1ee7a n\u00f3 v\u00e0 m\u1eb7t b\u00e0n) b\u1ecb chuy\u1ec3n \u0111\u1ed9ng, tr\u1ecdng t\u00e2m v\u00e0 \u0111i\u1ec3m t\u1ef1a kh\u00f4ng c\u00f2n \u1edf c\u00f9ng tr\u00ean \u0111\u01b0\u1eddng th\u1eb3ng g\u00f3c n\u1eefa. L\u00fac \u1ea5y, d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a tr\u1ecdng l\u1ef1c, con l\u1eadt \u0111\u1eadt s\u1ebd \u0111ung \u0111\u01b0a quanh \u0111i\u1ec3m t\u1ef1a cho \u0111\u1ebfn khi kh\u00f4i ph\u1ee5c l\u1ea1i v\u1ecb tr\u00ed b\u00ecnh th\u01b0\u1eddng c\u1ee7a n\u00f3. M\u1ee9c \u0111\u1ed9 nghi\u00eang l\u1ec7ch c\u1ee7a con l\u1eadt \u0111\u1eadt c\u00e0ng l\u1edbn, kho\u1ea3ng c\u00e1ch ngang gi\u1eefa tr\u1ecdng t\u00e2m v\u00e0 \u0111i\u1ec3m t\u1ef1a l\u1ea1i c\u00e0ng l\u1edbn, hi\u1ec7u qu\u1ea3 \u0111ung \u0111\u01b0a do tr\u1ecdng l\u1ef1c sinh ra c\u0169ng c\u00e0ng l\u1edbn, xu th\u1ebf khi\u1ebfn n\u00f3 ph\u1ee5c h\u1ed3i v\u1ec1 v\u1ecb tr\u00ed c\u0169 c\u0169ng c\u00e0ng r\u00f5 r\u1ec7t. V\u00ec v\u1eady, con l\u1eadt \u0111\u1eadt c\u00f3 x\u00f4 c\u0169ng kh\u00f4ng th\u1ec3 nh\u00e0o \u0111\u1ed5 \u0111\u01b0\u1ee3c.<\/p>\n\n\n\n
Hi\u1ec7n t\u01b0\u1ee3ng nh\u1eefng v\u1eadt th\u1ec3 v\u1ed1n \u0111\u1ee9ng y\u00ean, nh\u01b0 ki\u1ec3u con l\u1eadt \u0111\u1eadt, sau khi b\u1ecb nh\u1eefng nhi\u1ec5u \u0111\u1ed9ng nh\u1ecf m\u00e0 c\u00f3 th\u1ec3 t\u1ef1 \u0111\u1ed9ng ph\u1ee5c h\u1ed3i l\u1ea1i tr\u1ea1ng th\u00e1i th\u0103ng b\u1eb1ng \u1edf v\u1ecb tr\u00ed c\u0169, trong v\u1eadt l\u00ed ng\u01b0\u1eddi ta g\u1ecdi \u0111\u00f3 l\u00e0 s\u1ef1 th\u0103ng b\u1eb1ng \u1ed5n \u0111\u1ecbnh (c\u00e2n b\u1eb1ng b\u1ec1n). C\u00f2n nh\u1eefng v\u1eadt th\u1ec3 h\u00ecnh c\u1ea7u nh\u01b0 qu\u1ea3 b\u00f3ng b\u00e0n, b\u00f3ng \u0111\u00e1, b\u00f3ng chuy\u1ec1n, v.v. sau khi ch\u1ecbu ngo\u1ea1i l\u1ef1c t\u00e1c \u0111\u1ed9ng, c\u00f3 th\u1ec3 ti\u1ebfp t\u1ee5c gi\u1eef th\u0103ng b\u1eb1ng \u1edf b\u1ea5t k\u00ec v\u1ecb tr\u00ed n\u00e0o th\u00ec lo\u1ea1i tr\u1ea1ng th\u00e1i \u0111\u00f3 g\u1ecdi l\u00e0 th\u0103ng b\u1eb1ng phi\u1ebfm \u0111\u1ecbnh (c\u00e2n b\u1eb1ng phi\u1ebfm \u0111\u1ecbnh). V\u1eadt th\u1ec3 \u1edf tr\u1ea1ng th\u00e1i th\u0103ng b\u1eb1ng phi\u1ebfm \u0111\u1ecbnh th\u00ec tr\u1ecdng t\u00e2m v\u00e0 \u0111i\u1ec3m t\u1ef1a c\u1ee7a n\u00f3 lu\u00f4n lu\u00f4n n\u1eb1m tr\u00ean c\u00f9ng m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng v\u00e0 \u0111\u1ed9 cao c\u1ee7a tr\u1ecdng t\u00e2m kh\u00f4ng bao gi\u1edd bi\u1ebfn \u0111\u1ed5i. C\u00e2y b\u00fat \u0111\u1eb7t n\u1eb1m ngang tr\u00ean b\u00e0n l\u00e0 m\u1ed9t lo\u1ea1i th\u0103ng b\u1eb1ng phi\u1ebfm \u0111\u1ecbnh, b\u1ea5t k\u1ec3 n\u00f3 l\u0103n t\u1edbi \u0111\u00e2u, \u0111\u1ed9 cao c\u1ee7a tr\u1ecdng t\u00e2m v\u1eabn kh\u00f4ng bi\u1ebfn \u0111\u1ed5i.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: Con l\u1eadt \u0111\u1eadt; Tr\u1ecdng t\u00e2m; Th\u0103ng b\u1eb1ng \u1ed5n \u0111\u1ecbnh; Th\u0103ng b\u1eb1ng<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
M\u1ecdi ng\u01b0\u1eddi \u0111\u1ec1u c\u00f3 th\u1ec3 nh\u1eadn th\u1ea5y hi\u1ec7n t\u01b0\u1ee3ng: vi\u00ean g\u1ea1ch n\u1eb1m ngang r\u1ea5t \u1ed5n \u0111\u1ecbnh, d\u1ef1ng n\u00f3 \u0111\u1ee9ng th\u1eb3ng l\u00ean th\u00ec r\u1ea5t d\u1ec5 b\u1ecb \u0111\u1ed5 nh\u00e0o; c\u00e1i chai \u0111\u1ef1ng n\u1eeda chai n\u01b0\u1edbc \u0111\u1eb7t \u0111\u1ee9ng tr\u00ean m\u1eb7t \u0111\u1ea5t b\u1eb1ng ph\u1eb3ng th\u00ec r\u1ea5t \u1ed5n \u0111\u1ecbnh, chai kh\u00f4ng ho\u1eb7c chai \u0111\u1ef1ng \u0111\u1ea7y n\u01b0\u1edbc th\u00ec t\u01b0\u01a1ng \u0111\u1ed1i d\u1ec5 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[15,7],"tags":[],"class_list":["post-5521","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-vat-ly"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/5521","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=5521"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/5521\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=5521"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=5521"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=5521"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}