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We all know that music is a powerful influencer. A movie without a soundtrack doesn’t inspire the same emotional journey. A workout without a pump-up can feel very boring. But is there a way to quantify these reactions?In a new paper, researchers at the University of Southern California mapped out how things like pitch, rhythm, and harmony trigger different types of activity,psychological reactions, and emotions and how machine learning could use those relationships to predict how people might respond to a new piece of music. The results, presented at a conference show how we may one day be 玉米的果穗时常有缺粒，向日葵的籽粒也常出现空瘪，其主要原因:A．开花不正常B．受精作用不充足C．传粉不足D．子房和胚珠发育不好