Memory cells are long lasting cells that remember this exposure and can respond very quickly on second exposure.

记忆细胞可以长时间记忆与抗原的接触,并在再次免疫中迅速做出应答

耶鲁公开课 - 生物医学工程探索课程节选

If the baby really sees it as different, the baby will look longer, and you could use that as a measure of what babies find different.

如果婴儿认为此物与之前出现物体不同,婴儿的注视时间会变长,你可以将注视时间变长,视为婴儿发现物体间区别的一种标志

耶鲁公开课 - 心理学导论课程节选

They can be on store shelves for a long period of time, and that has to do with the economics of food, especially food available to the poor, which we'll discuss later.

因此可以在商品货架上销售很长一段时间,这也与食物的经济学价值有关,特别这类食物穷人也买得起,这个我们以后会讨论

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选