Ignorant children sometimes laugh at beggars and tramps.

无知的孩子们有时会嘲笑乞丐和无家可归的人。

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People also sometimes laugh when they feel nervous or are being unfriendly.

人们在感觉紧张或者不友好的时候，也有可能大笑出声。

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The people who share sidewalks with me must wonder why I sometimes laugh out loud.

和我同在一条人行道上的路人一定很纳闷，为何我会不时地笑出声。

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Sometimes they laugh at me.

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Then he laughed that high, rapidfire laugh that sometimes makes its way into the beginnings and ends of his tracks, and sauntered off around a corner.

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Now, we can laugh about this, because sometimes it hurts too much to cry.

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