One thing is very clear to me based on this thought exercise.

基于这种思考活动我们可以弄清楚一件事情。

youdao

It is thought exercise keeps vision sharp by keeping key blood vessels in the eye healthy into old age.

一般认为，运动可保持眼睛血管健康直到老，从而使视力敏锐。

youdao

As a thought exercise, co-evolution has been around for less than a decade, or as much as 30 years, depending on who you ask.

作为一种思潮，联合进化理论已经出现了至少十年，或者将近30年——这基于你向谁提出这个问题。

youdao

So, let's -- okay, so, why don't you all think about would happen -- we'll start with the thought exercise. You can switch back to my lecture notes then if this isn't going.

好吧，那你们想想会,发生什么，我们来想想,这个问题，如果那个不行的话,你可以转到我的讲义上来了。

麻省理工公开课 - 化学原理课程节选

This, of course, is merely a thought exercise.

ECONOMIST: A survey of commuting

Dressing up in layers also makes it harder to motivate yourself to exercise because a coat can easily hide any problem areas and banish the thought of exercise until spring.

FORBES: 5 Easy Desk-Approved Exercises

Girls were also concerned about what their friends thought about exercise, and said getting sweaty was not feminine.

BBC: Health