Today, I was in a really bad mood when a young girl came into my office sporting the most genuine smile I'd seen in a long while.

今天，我的心情非常糟糕的时候，一位年轻的女孩来到我的办公室，她一直对我展示着最真诚的笑容。

youdao

You don't want to be in a bad mood when you're taking a test, no evidence that it really sort of fundamentally changes the brain or re-organizes the way your neurons or anything fancy like that.

没有人愿意测试时情绪不佳，没有证据显示它能够根本的改变大脑或是使神经元或任何类似有趣的东西重组。

youdao

Some students always with pessimistic mood in the face of all things, as long as they unwilling or in a bad mood, drop by drop tears, really upset people.

有些同学总以悲观的心情面对所有事物，他们只要不甘心或心情不好，都一滴一滴地流下眼泪，真是让人懊恼。

youdao