本集核心英语单词及例句：

1.familiar (adj.)熟悉的；通晓的
It has been a familiar problem in the current downturn.
在当下的经济下滑中，它已经是一个常见的问题。

2.acquaint (adj.)了解；知晓
He is well acquainted with the literature of France, Germany and Holland.
他对于法国、德国和荷兰的文学了如指掌。

3.diligent (adj.)勤奋的；勤勉的
Jim is a diligent and prolific worker.
吉姆是个勤奋多产的工人。

4.getter (n.)获得者；吸气剂
He's a real go-getter. He built up his business from scratch.
他是一个进取又勤奋的人，他是白手起家的。

5.internally (adv.)内地；内心地
The Canadians prefer to run their portfolios internally and invest directly.
加拿大人更喜欢在内部经营投资组合以及直接投资.

6.motivated (adj.)积极性的
People usually learn best when they're motivated.
人们往往在受到激励的时候可以学得最好。

7.whine (v.)哀诉，诉怨
They come to me to whine about their troubles.
他们到我这儿来不停地唠叨他们的烦恼。

8.grindstone (v.)持续辛勤地工作
We have to put our noses to the grindstone if we want to finish painting the house today.
如果我们今天想把房子漆完就得埋头苦干。