Something else must lie behind your sudden interest in football.
你突然对足球感兴趣肯定是有原因的。
Dr Heard suggested economic reasons might lie behind the new marriage story.
赫德博士认为，经济因素可能是这一新婚姻现象背后的动力。
Two things lie behind this social progress.
这一社会进步得益于两方面原因。
Two things lie behind this social progress.
这一社会进步得益于两方面原因。
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