The nonsmooth morphology of primaries is propitious to reducing the air vortex resistance which is caused by flapping volitation.
鸽初级飞羽的非光滑形态，有利于减少振翅飞翔中产生的空气漩涡的阻力。
2
Although they adore object each are not identical, but the property that they adore star is same however, it is the volitation of a kind of spirit, it is the record that they grow.