例句與造句

1. a very small group of brain cells ( perhaps totaling just 100, 000 in humans ) at the base of the forebrain is maximally active only during non-rem sleep
   前腦底部有一群數(shù)量非常少的細胞（人類或許只有10萬個這種細胞），只有在非rem睡眠時期才會表現(xiàn)出最大的活性。
2. in this assay, a tetrazolium salt ( mtt ) is converted to a blue formazan product by enzymes active only in living cells . the amount of formazan produced can be quantitated using a microtitre plate reader
   rta一yqrl蛋白的細胞毒性約為rra蛋白的2一40倍，提示高爾基體可能是毒素在細胞內轉運過程中的重要一環(huán)。
3. It's difficult to find active only in a sentence. 用active only造句挺難的