Modulation envelope
[电] 调幅波的包封
🧩 词语组成解析
modulation
[[ˌmɔdju'leiʃən]]
n. 调制, 调节, 语调\\n[计] 调制
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
Yes. We're planning
是的。我们计划
I would like to write to the employment agency for a job.
我要写信给职业介绍所代我找一份工作。
The weather's often cold in North and windy in the East.It's often wet in the West,and sometimes warm in the south.
北部的天气常常寒冷，东部则常常利风。西部常下雨，南部有时则很暖和。