Fige
[醫(yī)]倒轉(zhuǎn)電場(chǎng)凝膠電泳
??? 情景例句
I love being with them.
我喜歡和他們?cè)谝黄稹?/div>
What's done can't be undone.
無可挽回。 潑水難收？
What was the population of the less developed countries in 1950?
1950年不太發(fā)達(dá)國(guó)家的人口是多少？