buten.[化]保泰松；苯基丁氮酮butconj.但是prep.除 ... 以外adv.仅仅；只pron.无不butul ricinoleate蓖酸丁酯butanol tolerance丁醇耐受性But prissy balked但是百利子哭叫起来了。butene dioic acid丁烯二酸But we digress.唷，我们跑题了。butanone dewaxing丁酮脱蜡butadiene process丁二烯法Butvopium Bromide溴化丁托品, 溴化对丁氧苄莨菪碱[解痉药]butyryl hydrazine丁酰肼But Not Exceeding但不超过