This was the basic motivation for that choice.
这是他那个选择的基本动机。
To achieve cognitive economy is the basic motivation for idiomatic meanings.
实现认知省力是习语义产生的根本动因。
Such thing like interest seems to be the basic motivation that drives people to make the decision on doing things.
兴趣这种东西,似乎是驱使人们下定决心去做某些事的基本动能。
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