Karidium
氟化钠
🗣️ 情景例句
Well, I will leave you two to talk.
嗯 ，我走开，你们谈吧。
He was anxious about his son's safety.
他担心他儿子的安全。
to work or worry about trifling things at the weekend.
在周末再让他们为琐事而动脑子和忧虑。