1.best-known 知名的,熟知的
例句:These were merely the best-known examples.
這些只不過是人們最熟知的一些例子而已!
2.toxic chemicals 有毒的化學物質
例句:Sea urchins can also be used by scientists to detect toxic chemicals.
海膽還可以用于探測有毒化學成分
。3.at least 至少;起碼
例句:Preparations would occupy at least an hour.
準備工作至少需要一個小時
。4.cancer-causing 致癌的;引發癌癥的
例句:Did you know that frying starchy foods can produce a cancer-causing substance?
你知道油炸、富含淀粉的食物會釋放致癌物嗎?