Covalently closed circular dna
[化] 共价闭环DNA
🧩 词语组成解析
adv. covalence（共有原子价, 共价）的变形
closed
[klozd]
adj. 关闭着的，封闭着的;密闭着的，保密的;<美>准备好了的，定了契约的;
v. “close”的过去式和过去分词;
clos=close关闭+ed已...的→关闭了的
DNA
[,di:,en'ei]
abbr. did not attend 没有参加;does not answer 不回答;
🗣️ 情景例句
That's the recreation center and restaurant.
那是娱乐中心和餐馆。
Just a minute and I'll see if there are any flights.
等一下，我来看看有没有班机。
I'll see if we can take the whole case.
那我考虑看看是不是可以买整箱。