中文中关于狗的大多数表达，如“流浪狗”、“疯狗”、“走狗”和“狗抓老鼠”，都有不好的含义。

Most expressions in Chinese about the dog, for example, "a homeless dog", "a mad dog", "a running dog" and "a dog catching a mouse", have bad meanings.

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心情不好的时候，人们就不会表达感激之情。

People are ungrateful when in a bad mood.

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研究表明表达积极情绪的状态更新上午写的最多，一天下来，情绪慢慢变得不好。

The study found that status updates expressing positive emotions were highest in the morning, and became increasingly negative as the day wore on.

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That's not meant to be a bad word but suggests being influenced, one might say, in the sense of "open the window and influenza," by those signs that precede it.

这不是个不好的词，只是想要表达影响的意思，人们可能说将一个符号之前的符号称作是“,“打开了窗户，引发了流感“

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