Closed system
[计] 闭合系统\\n[化] 封闭系统
🧩 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
🗣️ 情景例句
Speaking of promoting the book,
说起促销书的事
He likes playing at the model buiding.
他喜欢玩摸型建筑。
Three pounds fifty pence,please.
请付3英镑50便士。