Std.
[医] 皮肤试验剂量
🗣️ 情景例句
Are you here on business or for pleasure?
你来这儿是出差还是游玩？
That's very nice of you, but I really can't.
谢谢你的好意，但是我实在不能再呆了。
Can I get a drink ?
我给你拿点饮料好吗？