combinatorics pl-n.组合数学;组合学
鸽巢原理是组合学中一个非常重要的原理.
The pigeonhole principle is a important principle in <em>combinatorics</em>.
拔丝苹果 ["candied apples","hot candied apple"]
脱离危险 ["be out of danger"]
尼龙线 ["nylon thread"]
好好享受
藤蔓
承载 ["bear the weight (of sth)"]
水下切割 ["underwater cutting"]
课堂
经济成长率 ["economic growth rate"]
助教 ["(teaching) assistant"]