短语词组短语tread d water 踩水to tread water 踩水You tread water 你踩水Performance tread water 学习成绩止步不前Beasts Tread Water 野兽踩食tread water lift wheel 脚踏水车Jump in and tread water 跳水并能在深水中;跳水并能在深水中踩水 返回 tread water