表现出热情就有可能显得不科学、不客观；这是为了迎合学生的情感而不是他们的智力。
To show enthusiasm is to risk appearing unscientific, unobjective; it is to appeal to the students' emotions rather than their intellect.
埃克曼和他的同事最近在对10种文化的研究中也得到了类似的结果，研究中允许参与者报告多种面部表情表现出来的情感。
Ekman and his colleagues more recently obtained similar results in a study of ten cultures in which participants were permitted to report that multiple emotions were shown by facial expressions.
为什么美国人在公共场合会表现出这样的情感呢？
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