Grains containing detectable amounts of aflatoxin should therefore not be used for food or feed . 因此,凡測出含有阿夫羅毒素的谷物都不能做糧食或飼料。
With rare exceptions such as a pure quartz sandstone, every rock contains detectable amounts of abundant metals . 除了象純石英砂巖等少數(shù)例外,每種巖石都含有若干可檢出的富有金屬。