Step4 language points
1. The report is based on the findings of research that was carried out in Sweden. (P14)该报告是基于一项在瑞典进行的研究的发现写成的.
base sth. on sth.
The film is based on a short story by Thomas Mann.
2. This study was conducted with 200 mice, half of which were exposed to radiation while the other half did not receive any radiation. (P14) 该研究的实验对象是200只老鼠,其中半树暴露在辐射环境下, 而另一半未受到任何辐射.
n. [C]暴光
Today's newspaper contains a searing expose of police corruption.
v. [T] 暴露
The plaster on the walls has been removed to expose the original bricks underneath.
He damaged his leg so badly in the accident that the bone was exposed.
This photograph was under-/over-exposed (= too little/too much light was allowed to reach the film).
