tread water

US /trɛd ˈwɔtɚ/

UK /tred ˈwɔ:tə/

A1 初級
v.i.不及物動詞踩水
I had to tread water for an hour waiting for the rescue boat.
v.i.不及物動詞停滯不前
The project is just treading water; we need new ideas to move forward.

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