read-only operation

• 只读操作

read-only operation的用法和样例：

例句

1. Server waits for files to be written to the disk before the next read.
   服务器必须等文件被写入到磁盘后才能开始下一次读操作。
2. The rate at which Address Book clients perform property read operations.
   地址簿客户执行属性读操作的频率。