Polychlorinated
[医]多氯化的
🗣️ 情景例句
There's nothing you can do about it.
你对此无能为力。
It's up to us to help those in need.
我们有责任帮助那些有困难的人。
Such undertakings require the precise planning and foresight of military operations.
这种活动需要有军事行动般的周密布署和预见能力。