alter file

• 修改文件

alter file的用法和样例：

例句

1. The file could not be found or modified.
   未能找到或修改文件。
2. A checkout discourages others from modifying a file, and a lock prevents them from doing so.
   签出妨碍了别人修改文件，即一个锁阻止别人对文件的修改。