a drop in the bucket滄海一粟;九牛一毛;滄海一栗;微不足道
a drop in the ocean滄海一粟;海上接應;九牛一毛
drop-in嵌入式;普適性;掉入
Removable drop-in suiter可移除的西裝套袋
Drop-In Floor Box地面布線系統
drop in delivery泵排量降低;出貨減少;降低泵的排量
Drop in Anchors內迫壁虎
Drop in the bucket九牛一毛;水桶的一滴
drop in beam掛梁