cash/money.

3.自信是件好事，但自信与自负是有区别的。

It’s good to be confident (about yourself), but there is a difference between confidence and conceit.

4. 只有坚持到底的人才会成功。半途而废的人永远也无法实现梦想。

Only those who stick it out can achieve success. Those who give up halfway will never realize their dreams.

5.一个真正的英雄有勇气，有高尚的目标，而且乐于奉献。

A true hero possesses/has courage, a noble purpose and a willingness to make sacrifices.

6. 任何人只要拿起这本小说读了第一段，就会发现很难把它放下。

Anyone who picked up this novel and reads the first paragraph will be hard pressed to put it down.

7.从某种意义上说，生活就像游泳。如果总是扶住池边，就永远也学不会。

In a sense, life is like swimming; if you keep holding on to the sides of the pool, you (will) never learn.

8.一个民族的前途在很大程度上取决于其教育与培训的质量。

The future of a nation depends in a large measure upon the quality of education and training.

Unit 4

1.只有那些有过类似经历的人，才能够完全理解这一点。

Only those who have lived through a similar experience can fully appreciate this. /

The only people who can fully appreciate this are those who have lived through a similar experience.

2. 科学家们一直没有弄明白这些粒子是怎么形成、又是如何相互作用的。

Scientists have been hard pressed to figure out how these particles form and interact (with one another). / …are formed…

3.我要特别感谢每一个在这些年来以不同方式做出了贡献的人。

I’d like to express my special thanks to everyone who has contributed over the years in one way or another.

4.团队环境中员工个人的成功能带来公司的成功。

The individual success of the employees in a team environment results in success for the company.

5.这场战争，虽说从军事角度而言是成功的，却令经济几乎崩溃。

The war, although successful in military terms, left the economy almost in ruins.

6.他决定把自己的精力用到有益的事上，而不是整天守在电视机前。

He decided to channel his energies into something useful, instead of being glued to the TV set all day. / instead of sitting in front of the TV set all day long.

7. 力量与勇气是有区别的。生存需要力量，生活需要勇气。

There is a difference between strength and courage. It takes strength to survive. It takes courage to live.

8.她天生就是一个非常温柔亲切的人，总是乐于向别人伸出援手。

She was by nature a very affectionate person, always ready to give a helping hand to others.

Unit 7

1. 我们一起工作已经很长时间了，从来没有因为意见分歧而妨碍我们之间的友谊。

We have worked together for a long time and have never let our differing opinions get in the way