Closed under union
[计] 对\或\运算封闭
🧩 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
under
['ʌndɚ]
prep. 在…下面，在表面之下;在…的假定表面或掩饰下;少于，小于;在…情况下;
adv. 在下面;少于;在水下;在昏迷中;
adj. 较低的，下面的;
🗣️ 情景例句
Yeah. I really did do a good job, didn't I?
是的 ，我确实拍得不错， 对不对？
Would you mind giving me a push?My car has stalled.
你介意帮我推一下?我的汽车抛锚了。
I'd like to take these catalogs with me.
这些目录我想带走。