I do my best to live by this simple principle, but it is certainly very hard and quite complicated.
我一直都是尽我最大的努力用这条简单的原则生存的，但是，它真的很困难并且很复杂。
Being unappreciated by your boss could make it hard to do your work effectively.
上司的不赏识会影响你的工作效率。
I must do the trick by my hard work.
我要通过自己的努力来获得成功。
But it's a hard process to do because, as you know, the middle of a star is quite hot, almost by definition.
但这是一个艰难的过程。因为，如你所知，恒星中心相当炽热。
Only by working hard will we be able to do well in our exam.
只有刻苦学习才能在考试中取得好成绩。
You earn reputation by trying to do hard things well.
而名誉的来源是你尽力把艰难的事情做好。
You earn reputation by trying to do hard things well.
而名誉的来源是你尽力把艰难的事情做好。
应用推荐