Stel
abbr. 短時間接觸容許濃度（Short term exposure limit）
??? 情景例句
Is the boss coming by?
是老板過來了嗎？
Silence is sometimes the severest criticism.
沈默有時是最嚴厲的批評。
I would rather you came to see me now.
我寧愿你現在就來看我。