Chelatase
螯合酶
🗣️ 情景例句
And a bank about a mortgage.
还要和银行谈谈贷款。
A friend is never known till a man have need.
不到患难时，永远不能认识真正的朋友。
Oh dear! It's very cold today, isn't it?
天哪，天真冷，不是吗？