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.
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。
When in cursor-positioning mode, the user can tab to, or position the cursor on, any character in the input field.
当您处于游标定位模式时，用户可以切换，或者定位游标到输入区域的任何一个字符之上。
One pad represents the character under the cursor, the other gives the reader information about what is coming next, such as whether it is a letter or the end of the word.
其中，一个感应区代表指针下的文字，另一区则告知浏览者有关随之而来的内容，比如是否是字母或句子末尾。
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