本集核心英语单词及例句：

1.helmet (n.)头盔，钢盗
Dr.J always wears a helmet whenever he rides his bicycle at night.
每当J博士晚上骑自行车时总是戴着头盔。

2.career (n.)生涯；事业
He began his career as an apprentice.
他以当学徒开始他的职业生涯。

3.operate (vt.)操作；经营
I have just now remembered how to operate this machine.
我刚想起操作这机器的方法。

4.solar (adj.)太阳的；日光的
We can use solar energy to do many things today.
如今，我们可以利用太阳能做很多事情。

5.scrape (vt.)刮；擦伤
Mary scraped her knee when she fell off her bike.
Mary从自行车上摔下来擦伤了膝盖。

6.concrete (n.)混凝土；具体物
The machine rests on a bed of concrete
这个机器是安装在混凝土基座上的。

7.jealous (adj.)妒忌的；羡慕的
I was jealous of Mary's new bicycle.
我很羡慕玛丽的新自行车。

8.rely (vi.)依靠；信赖
You can't rely upon those people to help you.
你不能指望着那些人帮助你。