Amberplex
离子交换膜
🗣️ 情景例句
We will also need a letter of recommendation.
我们还要求一封推荐函。
Since the contract is about to expire, shall we discuss a new one?
这个合同将到期，我们来谈谈新合同的事宜吧。
Oh, I usually come on foot.
噢，我常步行来。