tread water
美 
英 
- na.踩水;〔比喻〕原地踏步;立游
 - 网络立泳;打水;没有进步
 
un.  | 1. to keep afloat without moving forward, by moving the legs and arms 2. to make no progress but manage to keep a situation the same for a period of time 3. to stay upright in deep water by moving your legs and arms so that your head stays out of the water  |