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
He gave them to me to hold on to them
他给我戒指， 要我自己保管，
His apology didn't seem sincere.
他的道歉看起来不是真诚的。
First of all, they may have come to this planet of ours thousands or millions of years ago,
首先，他们可能在几千年前或几百年万年前已来过我们地球，