1.best-known 知名的,熟知的
例句:These were merely the best-known examples.
这些只不过是人们最熟知的一些例子而已!
2.toxic chemicals 有毒的化学物质
例句:Sea urchins can also be used by scientists to detect toxic chemicals.
海胆还可以用于探测有毒化学成分
。3.at least 至少;起码
例句:Preparations would occupy at least an hour.
准备工作至少需要一个小时
。4.cancer-causing 致癌的;引发癌症的
例句:Did you know that frying starchy foods can produce a cancer-causing substance?
你知道油炸、富含淀粉的食物会释放致癌物吗?