咖啡能提神，而且不像酒精那样使人迟钝，因此咖啡深受知识分子的喜爱。
Coffee became popular with scholars as it sharpened the mind rather than dulled it like alcohol.
在布里斯托尔和班格尔的大学里开展这项研究的专家对含糖饮料使人们的味觉变迟钝的速度之快深感吃惊。
Experts who carried out the research at the universities of Bristol and Bangor expressed surprise at how quickly tastes could be dulled by exposure to sweet drinks.
也有说法是有些蚊子携带使人在一系列叮咬后对炎症反应迟钝的化学物质，这样他们就能得到更多的血。
It has even been suggested that some mosquitoes can transmit chemicals that make the host less sensitive to inflammation after a series of bites, so that more blood can be taken.
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