Envelops
n. 包络线；信封（envelop的复数）
🗣️ 情景例句
They hardly ever see each other.
他们几乎彼此不碰头。
Whom will you vote for?
你将投票给谁？
Technology trends may push Silicon Valley back to the future.
技术的发展趋势有可能把硅谷重新推向未来。