空等；久等。
例句：
- I had to kick my heels for nearly two hours before I could see the boss. (我空等了將近兩個小時才見到老闆)
- She cooled her heels for hours at the gate of the Embassy. (她在大使館大門口苦等了好幾個鐘頭)
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空等；久等。
例句：
本文亦刊載在下列網址：
http://htmfiles.englishhome.org/idioms/idioms_body.htm