So that, to think nothing is something you have to work at; it's something that you can be preoccupied with.

所以脑子里一片空白,也是需要你努力的事;,需要全神贯注的事。

耶鲁公开课 - 1945年后的美国小说课程节选

The kind of effort that it does require is the effort of application, of applying into your life, of introducing behavioral actual change to your life.

它所需要的努力是一种应用的努力，努力把它应用到你的生活里，努力把行为的实际改变带入你的生活。

哈佛公开课 - 幸福课课程节选

Again it doesn't require the effort that you'll need in 55 or in English 10A.

再一次它不需要你像55号课和10A号英语课那样的努力。

哈佛公开课 - 幸福课课程节选