这就是我不笑的原因。
他皮笑肉不笑的，真虚伪。
我知道，他从来不笑，情绪也没有好的时候。
他的样子非常滑稽，我难以忍住不笑。
He looked so funny that I found it difficult to keep my countenance.
他总是模仿爸爸的说话方式，使我们不得不笑。
He often follows the way that our father speaks, which always makes us laugh.
他总是模仿爸爸的说话方式，使我们不得不笑。
He often follows the way that our father speaks, which always makes us laugh.
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