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They housed eight adult rats with two types of robotic rat—one social and one asocial—for four days.
他们将8只成年老鼠和2种机器老鼠（一种是社会性的，一种是非社会性的）一起饲养了4天。
youdao
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They housed eight adult rats with two types of robotic rat—one social and one asocial—for four days.
他们将8只成年老鼠和2种机器老鼠（一种是社会性的，一种是非社会性的）一起饲养了4天。
youdao