Stel
abbr. 短时间接触容许浓度（Short term exposure limit）
🗣️ 情景例句
How's everything with you?
你一切如何？
The students tumbled over each other as they got off the bus.
学生们下车的时候，由于拥挤一个叠一个的摔倒了。
No, I think it's open. Look!
不，我想开着呢！你看。