ebb

衰退；退潮；衰落英释nnthe flow of the sea away from the shore, when the tide goes out

衰退；减少；衰落；潮退英释vvif the tide ebbs, it flows away from the shore

1 ebb and flow,兴衰，起伏；潮的涨落

2 ebb tide,退潮，落潮

3 at a low ebb,处于低潮；衰败

4 flood and ebb,潮汐

5 ebb away,渐渐衰退；消逝

1 His confidence is at a low ebb..他的信心很低落。