这个结论是值得商榷的两个主要的原因。

That conclusion is debatable for two principal reasons.

youdao

一般来说，有两个主要的原因导致的盛行率在电视广告。

In general, there are two main reasons leading to the prevalence of commercials on TV.

youdao

导致视力下降的主要原因有两个：花在室内学习的时间太多，花在户外玩耍的时间太少。

Two main reasons can cause poor eyesight: too much time spent indoors studying and too little time spent outdoors playing.

youdao

Another characteristic of these years, which scholars refer to as the Dark Ages, just as they do the years after the fall of the Roman Empire-- dark for two reasons. Dark, in the most obvious way, because we don't have any writing, no record of them.

这也是这段时期的另一个特征,学者们称之为,黑暗时代,他们也是这么称呼,罗马帝国陷落后的那段时期的,称黑暗主要有两个原因,黑暗,最明显的理由,是因为我们没有任何关于他们的史料和记录

耶鲁公开课 - 古希腊历史简介课程节选