used to refer to computer files or memory that can be read or used, but not changed or added to in any way

For a file to be marked "read-only" there has to be a good reason to protect it. 要将一个文件标记为 "只读"，必须有一个需要保护的好理由来这么做。

Read-only memory cannot be erased or altered. 只读存储器不能被删除或更改。