\u0110\u00e1nh l\u00f4 xi\u00ean \u0111ang d\u1ea7n tr\u1edf n\u00ean ph\u1ed5 bi\u1ebfn v\u1edbi nh\u1eefng ng\u01b0\u1eddi ch\u01a1i l\u00f4 \u0111\u1ec1. L\u00f4 xi\u00ean hi\u1ec7n c\u00f3 c\u00e1c lo\u1ea1i l\u00f4 xi\u00ean 2, xi\u00ean 3 v\u00e0 xi\u00ean 4. V\u1eady c\u00e1ch ch\u01a1i l\u00f4 xi\u00ean 2 nh\u01b0 th\u1ebf n\u00e0o? C\u00e1ch t\u00ednh l\u00f4 xi\u00ean 2 v\u00e0 x\u00e1c su\u1ea5t c\u1ee7a n\u00f3 ra sao? H\u00f4m nay trong m\u1ee5c l\u00f4 \u0111\u1ec1 tr\u1ef1c tuy\u1ebfn, nh\u00e0 c\u00e1i <\/strong>xin gi\u1edbi thi\u1ec7u v\u1edbi c\u00e1c b\u1ea1n v\u1ec1 l\u00f4 xi\u00ean 2 c\u0169ng nh\u01b0 c\u00e1ch t\u00ednh l\u00f4 xi\u00ean 2.<\/p>\n
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