1882, "over-talkative," from slack-jaw (n.) "impertinent language" (1797), from slack (adj.) + jaw (n.). Meaning "open-mouthed and speechless" from astonishment, stupidity, etc., is from 1905.
雙語例句
1. Many publishers have simply become far too slack.
許多出版商就是變得過于懈怠了。
來自柯林斯例句
2. The boy's jaw went slack.
男孩張大了嘴巴。
來自柯林斯例句
3. She was staring into space, her mouth slack.
她雙唇微張，失神地望著前方。
來自《權(quán)威詞典》
4. Slack off those ropes there ; there's a storm coming!
把那里的繩索放松, 暴風雨就要來了!
來自《簡明英漢詞典》
5. Please slack up your speed. I can't run as fast as you!