也就是说，它将从紧挨着游标的上一行中复制同一列中的字符。

That is, it copies the character in the same column from the line immediately above the cursor. For example, a CTRL-Y in the following situation would insert an "m" at the cursor.

youdao

如果一行内容是以空格开始的，就认为它是上一行的延续。

If a line begins with white space, it is considered a continuation of the previous line.

youdao

日期写在信笺的右上端，位于信头下一行，信内地址上一行。

The date is always on the upper side of the right, and one line under the heading and one line above the inside address.

youdao

This is the poem in which the speaker grieves over a death by imagining a procession of mourners at the funeral.

在《牧歌》第十首中，讲述者想象葬礼上,的一行送葬者，来哀悼一个死者。

耶鲁公开课 - 弥尔顿课程节选

Pulling this lever or pushing the button would actually rotate the paper enough so that you'd be on a new line and it would also move the little imprinting head that prints the letters of the alphabet and such all the way to the left.

拉杆或按下按钮会让纸翻一下,这样你就能在新的一行上打字了,同时移动打印字母的,压印头,这样也能移到最左边。

哈佛公开课 - 计算机科学课程节选