然而，在真正的世界中，开关不是理想的，而且总是有一些损失。

However, in the real world, switches are not ideal and there always is some loss.

youdao

然而，在真正的世界中，开关不是理想的，而且总是有一些损失。

However, in the real world, switches are not ideal and there always is some loss.

youdao