Bit by bit. -To describe slow change. And to say something is simple, short and basic we had three binomials: Short and sweet; quick and dirty; cheap and cheerful.
Bit by bit. -描述缓慢变化。形容一些东西简单,简短和基本,有三个同义组合词:Short and sweet;quick and dirty;cheap and cheerful.
But the mating song is short and sweet because: " a very loud sound like that apparently has to be really short for the bird to be able to do it at all."