These cells are rare and so it's been hard to identify them, that's part of it.

这些细胞太少了,所以很难找到,这是原因之一

耶鲁公开课 - 生物医学工程探索课程节选

Well, as you might guess, we eat too much of the simple sugars and the disaccharide sugars and we eat too little of the complex carbohydrates.

如你所想,我们摄取了过多单糖和二糖,而摄入的多糖太少

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Are they contributing too much, too little?

是太多了还是太少了呢

耶鲁公开课 - 博弈论课程节选