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

This was the compassionate part of the compassionate conservatism.

但是小布什的这一政策是同情心,保守党表现同情心的标志啊。

斯坦福公开课 - 经济学课程节选