mean doing sth. 的意思是“意味着(必须要做某事或导致某种结果)”，其主语通常是指事物的词。例如：

Taking this job means taking a lot of risks. 接受这份工作意味着会遇到很多危险。　

Being a student means studying hard. 作为一个学生，(意味着)你要努力学习。

Success means working hard. 成功意味着工作努力。

Missing this train means waiting for another hour. 错过这辆火车意味着你得再等一小时。

Doing one thing well doesn't mean doing exactly one thing. 做好一件事并不意味着仅仅做一件事。

Wasting time means killing life. 浪费时间意味着浪费生命。

It means killing me that you lie to me. 对我撒谎就意味着要杀了我。

To take it apart now would mean wasting a lot of labour. （接动名词） 现在把它拆卸开，就意味着浪费大量的劳动力。

Revolution means liberating the productive forces. 革命意味着解放生产力。