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New situations requiring closer contact with the rabbit had been gradually introduced and the degree to which these situations were avoided, tolerated, or welcomed, at each experimental session, gave the measure of improvement.

需要与兔子更密切接触的新情况已逐渐出现，在每一次实验期间，对这些情况的避免、容忍或欢迎程度给予了改进的措施。

— Mary C. Jones 玛丽·琼斯