Stel
abbr. 短时间接触容许浓度（Short term exposure limit）
🗣️ 情景例句
Sounds like Richard.
听起来跟Richard一样。
He always forgets to wash behind his ears.
他总是忘记洗耳朵后面。
He says the Chinese people are very friendly.
他说中国人都很热情。