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
What?
什么办法？
His parents anticipate Gary's return home will be soon.
凯利的双亲认为他不久就会回家。
but custom, we have a way of thinking, is behaviour at its most commonplace.
至于风俗呢，只是些司空见惯的行为而已。