整句意思?unlessyouactuallyenjoywearingapocketprotector,you’vegotnobusinesstakingcalculus.口袋护套?怎么没见过谁用过?这里的business呢?除非你是学者专家，微积分和你完全无关？这里的business呢？具

Question

整句意思?
unless you actually enjoy wearing a pocket protector,you’ve got no business taking calculus.
口袋护套?怎么没见过谁用过?这里的business呢?
除非你是学者专家，微积分和你完全无关？
这里的business呢？具体呢？
口袋护套？是指专家才用这玩意吧！

Answer 1

pocket protector is a sheath designed to hold writing instruments and other small implements,such as slide rules,while preventing them from damaging the wearer's shirt pocket.
pocket protector是用来专某些专业文具的袋袋.
这句话的意思就是说微积分需要一些专业的知识/工具等等.如果你没有那些装备或者不喜欢做这么繁琐的事情,你就和微积分毫无瓜葛了.也就是你根本别想做微积分了.