Phosphonic
a. 膦的, 膦酸的
🗣️ 情景例句
Oh, Grandpa! How exciting!
啊 ，爷爷， 你真了不起。
I'm afraid you will be too tired
我怕你会太疲倦。
Here you are. Put them on, please. You must look after your clothes.
给你们，穿上吧！你们要好好保管你们的衣服。