1. But investigators were not satisfied with the answer: they still did not know what agent brought plasmodium to human beings.
    但是调查者对答案并不满意：他们仍不知道是什么媒介物把疟原虫带给了人类。

2. What then was the malaria-transmitting agent?
    那么，传染疟疾的中介又是什么呢？

3. It places a terrible strain on the mother-child bond by saddling the mother with the double burden of playing the role of both mother and father;
    离婚使得母亲既当母亲又当父亲而不堪重负，从而造成母子关系的紧张。

4. Their spaceship was equipped with a double door, which was fitted with a bellows between the ship and the outside.
    他们的太空飞船上装有两层门, 在这两层门之间, 即飞船与外界之间, 装有一个减压舱.

5. The Japanese spent $10.9 billion for teaching outside of regular classes last year, according to the institute, including $9 billion on jukus for students in the ninth grade or below — almost double the figure spent seven years ago.
    据该机构调查，去年日本人花在正常课堂教学之外的开支为109亿美元，其中90亿是花在课外学校，用于九年级或九年级以下的学生，这几乎是七年前的两倍。

6. His income is double hers.
    他的收入是她的两倍.

7. He suggested that a double railway-tunnel should be built.
    他提议建一条双轨隧道，

8. Albert did not fit the description of any secret agent Charles had ever read about.
    艾伯特一点也不像查尔斯读过的书里描写的特工。

9. Politicians agree, in principle, so America and the EU have been trying to reach a deal which would eliminate the need to double-test many products.
    政治家在原则上同意了， 因此，美国和欧洲一直在寻求达成协议，以便为许多产品取消双重检查。

10. “You are disappointed,” Albert said over his shoulder. “You were told that I was a secret agent, a spy, dealing in secrets and danger.
    "你一定很失望，" 艾伯特转过头来说道。"有人告诉你我是个特工，一个间谍，总是做秘密情报和危险的买卖。