He wrote her a letter stating that he did not want her back unless she returned of her own free will.

VOA: special.2009.06.27

Yeah, you are going to have a spike in your level of wellbeing-- I'm sure you had a spike in your level of wellbeing when you got this acceptance letter, but very quickly we go back to our base level.

没错，你们会感觉极至的幸福-,我肯定拿到录取信时,你们的幸福感也达到峰值，但很快又恢复到基础水平。

哈佛公开课 - 幸福课课程节选

s2 So, I'm passing in the first character in s2, I'm making it uppercase and then I'm putting it back so casually speaking this is just capitalizing the first letter of whatever word the user typed in to s2.

那么，我把第一个字符传递给，我把它转换成大写的，然后存下来,简单说，这就是把用户输入s2中的单词,的第一个字母转换成大写的。

哈佛公开课 - 计算机科学课程节选