没有参与这项研究的宾夕法尼亚大学心理学家尼娜·施特罗明格指出，她希望这种影响是真实的，但不能排除一些未知的混杂变量。
Psychologist Nina Strohminger at the University of Pennsylvania, who was not involved in the study, says she wants the effect to be real but cannot rule out some unknown confounding variable.
公共汽车上只坐满了一半，即便如此，一个小伙子还问尼娜她旁边的座位有没有人坐。
The bus was only half full. Even so, a young man asked Nina if the seat next to her was taken.
托尼和尼娜担心起来，他们没有那么多时间，杰克需要帮助。
Tony and Nina are worried that they do not have much time to help Jack.
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