n.
呻吟声；呜咽声
[口语]不满；牢骚
(水流、风发出的)凄切声；萧萧声；呼啸声
[罕用语]悲叹；哀悼
vi.
呻吟；呜咽：
The sick girl moaned a while, and then fell asleep.
那个生病的女孩呻吟了一会就睡着了。
The wounded man moaned ceaselessly.
那个伤员呻吟不止。
发出呻吟般的凄切声：
The wind was moaning through the trees.
风声凄厉地穿过树林。
[口语]悲叹；抱怨；哀悼：
to moan over the death of one's friend
哀悼朋友之死
He's always moaning about how hard he has to work.
他总是抱怨他得多么辛苦地工作。
vt.
以呻吟声说出：
The prisoner moaned(out) a prayer for help.
囚犯呻吟着祈求帮助。
悲叹；哀悼；抱怨：
He's always moaning that he has too much work to do
他总是抱怨他有太多的工作要做。
to moan over a new import tax
抱怨新的进口税