And this was more evidence that they just don't understand objects, and that this thing takes a lot of time and learning to develop.

这更证明了 他们并不理解客体的概念,而这种概念需要通过大量的时间学习,才能够掌握

耶鲁公开课 - 心理学导论课程节选

I think the reason why triathlon is not so, so big is just because it requires a lot of time.

我认为铁人三项运动之所以不够普及，
是因为它需要大量的时间。

对体育项目的热爱 - SpeakingMax英语口语达人

And yeah, it takes a long time to get good at it. A lot of fitness, too. A lot of working out.

要想划得熟练需要时间。体能也要好。再加上大量的锻炼。

MIT赛艇选手 - SpeakingMax英语口语达人