Envelope plane
[计] 包络面
🧩 词语组成解析
envelope
['envələʊp]
n. 信封，封皮;壳层，外壳;包裹物;[生物学]膜，包袋;
en 表示\"进入…之中，包围\" +velop =cover（盖上） +e → .信封, 封套, 封袋, [天]包层, [数]包迹, [生]包膜
🗣️ 情景例句
He considers himself intelligent.
他认为自己很聪明。
Counsel must be followed, not praised.
忠告必须照办，而不是赞美。
Only when he saw that the man was actually telephoning the police did he realize that they had all been the victims of a hoax.
当他看到那个工人真的是给警察挂电话，才恍然大悟，原来他们都成一场骗局的受害者。