1. Imagine a society in which cash no longer exists.: 祈使句，其逻辑主语是you。

in which 引导的定语从句修饰 a society。类似的定语从句如：
I want to find someone with whom I can have a sincere talk.
This is the place from which we start our journey.

no longer 不再
The Whites no longer live here.
怀特一家不再住在这里。

2. Paper money and coins are given up.: 纸币和硬币不再使用。

give up放弃
Only say to me, "stay," and I will give up this journey.
只要你说"留下"，我就放弃这次旅行。
If you want to succeed, you have to give up bad habits.
如果你想成功，你就必须克服坏习惯。

3. funds-transfer system: 资金转移或转帐系统

4. separate … from… 把……分开

The Atlantic Ocean separates America from Europe.
大西洋把美洲和欧洲分开。
Separate those two boys who are fighting.
把那两个大家架的孩子分开。

5. On the one hand… on the other … 一方面 …… 另一方面……

On the one hand, they have to work full time; on the other, they have to study hard.
一方面他们是全职工作人员，另一方面，又得努力学习。

6. Shops in once-dangerous areas can be open till midnight in safety.: 地处曾经属于危险区域的商店，可以安全开业到深夜。

once-dangerous areas 曾经有危险的地区。
in safety 安全
The children can stay here in safety.
孩子们可以安全地待在这里。
I think that I am in safety now.
我想我现在安全了。

7. have to 不得不，必须（表示客观上的需要）。

We have to get there on time.
我不得不按时赶到那里。

8. in the future (在)将来，未来

China will become a strong country in the future.
中国将来成为一个非常强大的国家。

9. put … into 把 …… 存入（或放进）

People put their money into the bank.
人们把钱存入银行。
Janet is putting her pencil box into her bag.
珍妮特把她的铅笔盒放进包里。

10. work out 找出，搞出，做出

work out a way找出解决办法
We are trying to work out a plan.
我们正努力制定出一个计划。
You have to work out a way to solve the problem.
你的找出解决问题的办法来。

11. sooner or later 迟早

Sooner or later she will find out the truth.
她迟早会搞清真相的。
This will happen sooner or later.
这事迟早会发生。