我曾撰文谈到过一系列与学习有关的习惯，但有一个方面是从来没有涉及到的，这就是集中注意力的问题，个中原因可能是本人觉得这是最难于养成的习惯之一吧。

I've written about a range of habits related to learning, but one I have not yet covered is concentration - perhaps because I find it among the hardest of habits to truly master.

youdao

我认为他能成为最受欢迎雕刻作品之一的原因是他本人是一位标志性人物。

I think this he's one of the most popular of the sculptures because he's such an iconic figure.

youdao

这是本人坚定立场原因之二。

This is the second reason that I hold my ground.

youdao