用“instinctive behavior”造句大全,instinctive behavior造句
Ayawnisaninstinctivebehavior:Youdon'thavetolearntodoit,andyawnsareevenpresentbeforebirth.Sinceallinstinctivebehaviorshaveanevolutionaryadvantageortheywouldnothavebeenretainedformillionsofyears,chance...