对于这次大灭绝，有很多种解释。

Various theories seek to explain this mass extinction.

youdao

已经提出了很多种解释。

Many explanations have been proposed.

youdao

对此有很多种解释，他们的动机也不全出于利他。

There are several explanations, not all of them altruistic.

youdao

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.

youdao

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.

youdao