Drs. Robert Epstein & BF Skinner with Pigeons-Part 1
drrobertepstein
between her peck at the the hidden color
""peck at"" — 실제 YouTube 영상에서 들어보세요
4개 YouTube 영상의 자막에서 ""peck at""의 사용 예시를 6건 찾았습니다. 클릭하면 원어민 발음을 들을 수 있습니다. 무료, 가입 불필요.
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the crow continues to like just peck at its at its back.
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TheSorryGirls
I am going to peck at this grass with my free range abilities.
Drs. Robert Epstein & BF Skinner with Pigeons-Part 1
drrobertepstein
harder still by introducing a delay between her peck at the the hidden color
Drs. Robert Epstein & BF Skinner with Pigeons-Part 1
drrobertepstein
between her peck at the the hidden color and the availability of the color keys
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And it flies up while the crow continues to like just peck at its at its back.