不安全性行為 unprotected sex
不敗記錄 clean record, spotless record
步步高升 Promoting to a higher position
補(bǔ)償貿(mào)易 compensatory trade
不承諾放棄使用武器 not undertake to renounce the use offorce
不承諾放棄使用武力 will not commit ourselves to rule out theuse of force
不打不成交 "No discord, no concord. "
不分上下的總統(tǒng)選舉結(jié)果 the neck-and-neck presidential election result
不感冒 have no interest
不記名投票 secret ballot
《不見(jiàn)不散》 Be there or be square.
不結(jié)盟運(yùn)動(dòng) non-aligned movement
不可抗力 force majeure