buff
/bʌf/noun [具体名词] 浅黄色，米色；暗黄皮革；爱好者，……迷；擦拭轮（或棒，垫），抛光轮
You use buff to describe someone who knows a lot about a particular subject. For example, if you describe someone as a film buff, you mean that they know a lot about movies. 爱好者
adjective [原级] 身体强健的，肌肉发达的；浅黄褐色的
in a condition of high physical fitness and body tone, maintained by regular exercise 体格健美的
