五小时过后，这些猪被安置在一个新的测试环境中，而一个装着食物的碗被藏在障碍物后面。
After five hours with a mirror, the pigs were placed in a new test area that contained a food bowl hidden behind a barrier.
五小时过后，这些猪被安置在一个新的测试环境中，而一个装着食物的碗被藏在障碍物后面。
After five hours with a mirror, the pigs were placed in a new test area that contained a food bowl hidden behind a barrier.
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