n.

1. 呻吟声；呜咽声[C]
   Each time she moved her head she let out a moan.

   她每转动一下头，就发出一声呻吟。

2. （风，树等的）萧萧声[U][S1]
3. 【口】悲叹；不满，发牢骚[C]
   His constant moan is that no one understands him.

   他老是抱怨没有人理解他。

vi.

1. 呻吟；呜咽
   The sick man moaned all night.

   病人通夜呻吟。

2. 发出萧萧声
   The wind came moaning through the trees.

   风发着呼啸声穿过树林。

3. 【口】悲叹；抱怨[（+about）]
   He is always moaning about how tired he is.

   他总是抱怨如何如何累。

vt.

1. 以呻吟声说出
   "I'm so stiff I can't move," she moaned.

   “我浑身发僵，动弹不得，”她呻吟着说。

2. 悲叹，抱怨[+（that）]
   He is always moaning his luck.

   他老是抱怨运气不好。

n.

1. a long, low sound expressing suffering or sexual pleasure.
   ▸a low sound made by the wind.
2. informal a trivial complaint.

v.

1. utter or make a moan.
   ▸literary lament.
2. complain or grumble.