end-of-file mark

例句：

1. 1. Theprogram uses an end-of-file marker to indicate the end of a file.
   该程序使用文件末尾标记来指示文件的结束。
2. 2. The server sent an end-of-file marker to indicate that it had reached the end of the file.
   服务器发送了一个文件末尾标记，表示它已经到达了文件的末尾。
3. 3.The programmer added an end-of-file marker to ensure that the file was properly closed.
   程序员添加了一个文件末尾标记，以确保文件被正确关闭。