choose their lifework on a hit-or-miss basis

hit or miss?意思 hit-or-miss transformation是什么意思 on a rolling basis on a currency-neutral basis 选择Birds ( )their wings as they fly on.A.hit B.beat C.knock D on a periodic basis什么意思 on a preliminary basis 是何意思? on a long-term basis是什么意思 The Internet has been hit or miss all week, 英语翻译Students choose which lectures to attend on the basis of 英语翻译：up 21.5 percent on a year-on-year basis hit on /hit