VOA慢速英语:Mixture of Safe Chemicals May Cause Cancer

短语讲解：

1. Every day, people come into contact with thousands of chemicals.

come into contact with 接触到，和…接触
例句：No one would come into contact with such a mean person.
对于这样小气的人，谁也不愿意和他打交道。

2. In fact, the chemicals are considered so safe that we wash with them.

in fact 实际上
例句：In fact, I'd like your autograph.
事实上 我想要你的签名。

3. Working in groups, the scientists explored how different chemical mixtures could lead to cancer.

lead to 导致
例句：That may lead to a serious split in our class.
那可能导致我们班的严重分裂。

4. It may turn out that the cancer-causing villain is not a single chemical at all.

turn out 关掉; 结果是; 制造
例句：Remember to turn out the lights before you go to bed.
临睡前别忘了关灯。

5. The increase of risk to cancer could be from exposure to many chemical compounds at the same time, or simultaneously.

at the same time 同时; 一起; 但是; 然而
例句：The machines all started up at the same time.
所有的机器都同时开动了。