对于这次大灭绝，有很多种解释。
起源：喝酒碰杯的习俗有很多种解释。
Origins: Many explanations have been advanced to explain our custom of clinking glasses when participating in toasts.
已经提出了很多种解释。
对此有很多种解释，他们的动机也不全出于利他。
医生已经对这一差距提出了很多种解释，包括不同程度的外界压力以及对疼痛的心理反应在性别上的差异。
Doctors have proposed several explanations for the disparity, including different levels of external stress and gender-related differences in the psychological response to pain.
现在已有很多种关于这种病的起因的解释。
There have been many explanations as to the causes of this disease.
离婚之所以越来越不受待见，可以有很多种相互排斥的解释，而且很难验证其正确性。
There are plenty of competing explanations for the diminishing appeal of divorce, and no easy way to discover which are true.
目前，科学家已提出很多种可能原因，来解释为什么一年中，流感病毒在某些月份更易在人群间传播。
Researchers have come up with many possible reasons to explain why nonpandemic flu viruses take hold only at certain times of the year.
有关法律规定，雇主不得对应聘者的性别加以歧视，他解释道：“这样的歧视有很多种，比如认为有孩子的应聘者在工作时容易分心。”
The law prohibits making employment decisions based on gender stereotypes, he explains. "For instance, that women or men with children are less committed to work than those without."
有关法律规定，雇主不得对应聘者的性别加以歧视，他解释道：“这样的歧视有很多种，比如认为有孩子的应聘者在工作时容易分心。”
The law prohibits making employment decisions based on gender stereotypes, he explains. "For instance, that women or men with children are less committed to work than those without."
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