Cheland
螯合配体
🗣️ 情景例句
when Teddy Roosevelt was President.
在Teddy Roosevelt当总统的时代。
He who cannot hold his peace will never live at ease.
嘴巴不紧，生活不宁。
Your wife would not be pleased to hear you say that.
你的妻子听到你那么说是会不高兴的。