Envelops
n. 包络线；信封（envelop的复数）
🗣️ 情景例句
We really appreciate your advice.
我们非常感谢你的建议。
She bursts into laughter.
她突然笑出声来。
But as they soon discovered, disguises can sometimes be too perfect.
但他们很快就发觉，化装的效果有时过分完美了。