科学家们称这种化合物可能致癌，但是并没有确凿的科学依据。

Scientists say the compound is likely to cause cancer but have no hard scientific proof.

youdao

我们食物中最自然不过的成分也可能致癌。

Even cancer may be caused by perfectly natural components of our food.

youdao

这个研究小组对手机可能致癌的依据是什么？

On what did the panel base its cellphone findings?

youdao

We're exposed to things that might cause cancer where weren't exposed to them before and so that might be a reason.

我们暴露于可能致癌的物质中,这些物质在以前是没有的,这可能就是原因之一

耶鲁公开课 - 生物医学工程探索课程节选