Some of them are unique to one source, some are not, but ultimately the claim is that these have all been merged, and have left us then with an overall total of ten. This may in fact be true.

有些瘟疫只有一个出处，有些则不是,最重要的是，它们被混在一起,流传下来的，就有了十次瘟疫，也许真的有。

耶鲁公开课 - 旧约导论课程节选

And so, he attempts to defend this position, justify it to his disciples who are worried that it may not be true.

所以,他试图捍卫他的观点,并试图说服,那些怀疑这一点的学生们

耶鲁公开课 - 死亡课程节选