A hard-working people

Happiness lies not in the external causes, but in our attitude to the outside world as a transfer, a hard-working people can not be unfortunate.

幸福并不在于外在的原因，而是以我们对外界原因的态度为转移，一个吃苦耐劳惯了的人就不可能不幸。

Well, of course, the best thing is medicine for really bad diseases (疾病). A lot of scientists are working very hard to stop diseases like Ebola, a terrible disease that has killed many thousand people in Africa.

当然了，最好的东西是治疗严重疾病的药。许多科学家正在努力对抗各种疾病，如埃博拉病毒这种可怕的疾病，而非洲已有几千人因此丧命。

What they mean is that by working hard, a person can learn skills that differentiate him from other people, and earn for himself whatever he desires.

他们的意思是，通过辛勤的劳动，一个人可以学到使他与众不同的技巧，这样无论他想要什么都可以得到。