Stel
abbr. 短时间接触容许浓度（Short term exposure limit）
🗣️ 情景例句
No buts.
不要说可是。
I know the boy whose father is an attorney.
我知道那个男孩的父亲是律师。
It looks like a chicken. But I don't think chickens can swim.
看起来像只小鸡。不过我认为小鸡不会游泳啊！