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
Fine. Are you buying a house
好的。你们是要买房子呢？
How many languages do you speak?
你说多少种语言？
A great many former pupils will be attending a farewell dinner in his honour next Thursday.
很多老同学都准备参加下星期四为他举行的告别宴会。