Drs. Robert Epstein & BF Skinner with Pigeons-Part 1
drrobertepstein
between her peck at the the hidden color
「"peck at"」— 実際の YouTube 動画で聞く
4 本の YouTube 動画の字幕から「"peck at"」の使用例を 6 件見つけました。クリックしてネイティブの発音を聞けます。無料・登録不要。
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the crow continues to like just peck at its at its back.
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I'm 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.