基于一些很容易理解的原因，老师在教室里没什么练习的机会(医生却不同，他们可以做实习医院做大量的练习)。

For understandable reasons, teachers rarely get much training in their own classrooms (in contrast, doctors do a lot of training in hospital wards).

youdao

对于胆小的人来说，这是没什么用的，因为这可能很容易损坏你的。

This was not sort of for the timid iPhone because you could very easily brick your iPhone.

youdao

认识到这点：我们注定要看到事情消极、积极的部分，当然，人们很容易关注积极的，但是忽视消极方面也没什么好处。

Know this: we are destined to see both the negative and the positive and, while it is certainly nice to focus on the positive, it does no good to ignore the negative.

youdao

This was not sort of for the timid iPhone because you could very easily brick your iPhone.

对于胆小的人来说，这是没什么用的,因为这可能很容易损坏你的。

哈佛公开课 - 计算机科学课程节选