的用户模式应用程序请求读取某些设备/写，即让I /O操作。

The user-mode application requests to read/write from some device, i. e. makes I/O operation.

youdao

的用户模式应用程序请求读取某些设备/写，即让I /O操作。

The user-mode application requests to read/write from some device, i. e. makes I/O operation.

youdao