Stel
abbr. 短时间接触容许浓度（Short term exposure limit）
🗣️ 情景例句
I think it's about time we got going.
我想差不多是告辞的时候了。
I wish I could, but it's already late.
我是想多呆一会儿，但是时间已经很晚了。
So how did you get into the castle?
那么，你是怎么混入城堡的呢？