Double Breadth First Search双向广度优先搜索
Double-first bachelor degree双学学士学位
Double First-rate双一流
double first cousins双重表亲
double first cousin双重亲表兄妹;双重表兄妹;双重亲表兄弟姐妹
double first-class initiative双一流
Double black leather first layer双面头层牛皮
Double-sided First Layer of Leather双面头层牛皮
Tiny Love Double-Sided First Book小爱双面第一本书
N(名词) a first-class honours degree in two subjects 两门学科获优等成绩 [英国英语]