The displays do not have to be fully functional, but should include some level of functionality.

该显示器不需要有完整的功能，但是应该包括某种层次的功能性。

youdao

The displays do not have to be fully functional, but should include some level of functionality.

该显示器不需要有完整的功能，但是应该包括某种层次的功能性。

youdao