First, love is a very complex emotion, difficult to describe and measure.
首先，爱是非常复杂的情绪，困难的描述而且测量。
More complex expression of emotion were probably learned and therefore more specific to each culture.
更复杂些的情绪表达也可能被认，因此对每种文化而言更具体。
More complex expression of emotion were probably learned and therefore more specific to each culture.
更复杂些的情绪表达也可能被认，因此对每种文化而言更具体。
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