Buth布特butconj.但是prep.除 ... 以外adv.仅仅；只pron.无不butolic acid紫铆醇酸But Not Over但没有结束Butkevichius布特克维丘斯butyrylamide丁酰胺buty formate[机] 甲酸丁酯butyric acid丁酸,酪酸butanonediol丁酮二醇butriptylene丁替林(抗抑郁药)butyryl urea丁酰脲but too true不幸