Ph\u01b0\u01a1ng ph\u00e1p d\u00e0n \u0111\u1ec1 \u0111\u00e1nh quanh n\u0103m l\u00e0 c\u00e1ch ch\u01a1i l\u00f4 \u0111\u1ec1 quen thu\u1ed9c \u0111\u1ed1i v\u1edbi h\u1ea7u h\u1ebft anh em trong gi\u1edbi. Tuy nhi\u00ean, \u0111\u1ec3 ch\u1eafc ch\u1eafn ph\u1ea7n tr\u0103m th\u1eafng cao, ch\u00fang ta c\u1ea7n ph\u1ea3i x\u00e2y d\u1ef1ng chi\u1ebfn thu\u1eadt kh\u00f4n kh\u00e9o v\u00e0 khoa h\u1ecdc. Tham kh\u1ea3o b\u00e0i v\u1ebft c\u1ee7a nh\u00e0 c\u00e1i <\/strong>sau \u0111\u00e2y nh\u00e9.<\/p>\n
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