Stel
abbr. 短时间接触容许浓度（Short term exposure limit）
🗣️ 情景例句
Yes. And I'm not trying to take her place.
是的 ，我不想取代她。
Speech is the picture of the mind.
言为心声。
steam boats carried thousands of visitors across the Channel from Europe.
但汽船还是把成千上万的参观者从欧洲大陆送过了英吉利海峡。