like cats, babies appear to engage in what's called "preferential looking"—looking longer at things that are interesting or unusual than things they perceive as normal.
2018年12月四级真题（第三套）阅读 Section C
英语六级真题
Congress needs to find the courage to allow Medicare to pay preferentially for treatments proven to be superior.
出自-2016年6月阅读原文
柯林斯高阶英汉双解学习词典释义
ADJ-GRADED
优先的；优惠的；优待的
If you get preferential treatment, you are treated better than other people and therefore have an advantage over them.
"a discriminatory tax""preferential tariff rates""preferential treatment""a preferential shop gives priority or advantage to union members in hiring or promoting"