New words：

groan [grəun]
v.呻吟；叹息；抱怨；发嘎吱声,受重压
n.呻吟声；叹息声；哼哼声；嘎吱声

Sample Sentences：

The dying soldier was groaning with pain.
The speaker was groaned down by the audience.
She's always groaning on about how much she has to do.

We heard the groans of the man who had fallen off the cliff.
The old chair gave a groan when the fat man sat down on it.

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