Heterochromatin has shown to be composed largely of short repeated polynucleotide sequences.异染色质大部分是由短而重复的多核苷酸序列所组成的.Chromosome material with exhibits of such behaviour is called heterochromatin.表现这种现象的染色体物质叫做异染色质.The ac...
You can't call a hedgehog cuddly – that's a contradiction in terms!你不能说刺猬逗人喜爱——那个说法,词语自相矛盾.The hedgehog rolled itself up.刺猬把身子蜷缩成一团.A hedgehog rolls itself into a ball when attacked.刺猬一受到攻击就蜷缩成一团.A hedgehog...