It would be very wise for an animal to weigh gains and losses from an evolutionary perspective.
从进化论的角度看，权衡得失对动物来说是非常明智的。
There lay great limitations to weigh the gains and losses of economic benefits with the balance of trade.
贸易差额在衡量经济利益得失上存在严重局限性。
There lay great limitations to weigh the gains and losses of economic benefits with the balance of trade.
贸易差额在衡量经济利益得失上存在严重局限性。
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