[ C ] something or someone that helps protect from harm缓冲物；起缓冲作用的人

[ C ] the metal parts at the front and back of a train or at the end of a track, that help protect the train and reduce damage if the train hits something（火车的首尾或轨道末端的）减震器，缓冲器

[ C or U ] a chemical that keeps a liquid from becoming more or less acidic缓冲剂

[ C ] an extra supply of materials that a company keeps in order to prevent a situation where none are available缓冲储备

[ C ] UK old-fashioned a silly old man老古板

[ T ] to provide protection against harm提供保护，使不受伤害

[ I or T ] When a computer buffers information or buffers, it stores information temporarily in its memory while dealing with it or sending it.（计算机）缓存于内存中