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20世纪30年代,奥地利动物学家洛伦兹在动物心理实验中发现,在动物早期的发育过程中,动物的某一反应或某一组反应在某一特定时期或阶段中最容易获得,
In the 1930s, the Austrian zoologist Lorentz found in animal psychology experiments that an animal’s reaction or a group of reactions is most easily obtained in a particular period or stage during the early development of the animal,