Episomal
游离基因的（生物学术语）
🗣️ 情景例句
I estimate his age to be about 30.
我估计他的年龄大约30岁。
Where were you born?
你出生在什么地方？
It had broken down the previous summer, and though I promised to repair it, I had never got round to it.
那台割草机去年夏天就坏了，尽管我答应修，但一直没抽出时间，