it is (u ) to keep working so hard,it doesn't work at all

来源:学生作业学帮网 编辑:学帮网 时间:2024/05/31 18:53:58

it is (u ) to keep working so hard,it doesn't work at all

useless
无用的,没用的.
不停地努力工作毫无用处,因为它根本就不能工作.