Stf
[医][=serum thymus factor]血清胸腺因子
🗣️ 情景例句
Don't mention it. What would you like to drink?
别客气，想喝点什么？
When the fox preacheth,then beware your geese.
每逢狐狸讲道，当心鹅儿遭殃。
You've done very well. It's a pity you missed the sports meeting last week.
你学得不错嘛。很可惜，你错过了上周的运动会。