Every challenge in energy production is an opportunity to innovate and improve.

The magic number 150 suggests that the size of our social networks is limited by the size of our brains.

There is no such joy in the tavern as upon the road thereto.

国会议员对职位的热情非常强烈，即使不是绝对不名誉的。

我们不是从祖先那里继承地球；我们是从子孙那里借来的——这在林业中尤其如此。