single pair mating

• 单对交配

single pair mating的用法和样例：

例句

1. Because parrots have low reproductive success,a pair will typically produce only one clutch of two or three eggs a year.
   由于鹦鹉的繁殖力低，一对交配成功的鸟儿通常每年只产下一窝，一到三个鸟蛋。