Dioxacarb
[机] 二氧威
🗣️ 情景例句
I have just begun to learn and my serve isn't very good.
我刚刚开始学习，发球不太好。
She's free on Friday and Saturday.
她周五和周六有空。
I'll have to ask my boss first.
我必须先问一下我的老板。