Closed chain
[医] 闭链
🧩 词语组成解析
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
chain
[tʃen]
n. 链子，链条;连锁，连续;拘束;连锁店或旅馆系列的事物;
vt. 用铁链锁住;监禁，束缚;
🗣️ 情景例句
Excuse me, May I have everyone's attention, please?
对不起，请大家听我说。
I'd like to change this ticket to the first class.
我想把这张票换成头等车。
Who was first? Who was second? Who was third?
谁是第一？谁是第二？谁是第三？