主因未详。

The details of the principal cause are not known.

《新英汉大辞典》

我们知道温室气体是暖化主因

We know greenhouse gases are the main cause of warming

youdao

钱不是主因。

Money is not the main reason.

youdao

“不活在当下”是不幸福、痛苦和匮乏感的主因。

Living in the "not now" is a chief cause of unhappiness, pain and lack.

youdao

频宽成本被视为YouTube营运仍处于亏损状态的主因之一。

The cost of bandwidth is seen as one reason YouTube still operates at a loss.

youdao

害怕失败是人们不快乐的主因。

Fear of failure is the main reason that people are unhappy.

youdao

那次头部碰撞现在成了引发血肿的主因。

That head bump is now blamed for triggering the hematoma.

youdao

傲慢自大是他失败的主因。

Arrogance was a major factor in his failure.

youdao

积极的态度是成功的主因。

A positive attitude is the key to success.

youdao

由化学成分的因子载荷矩阵得到四个主因子。

Four main factors were obtained from the factor load matrix.

youdao

由化学成分的因子载荷矩阵得到四个主因子。

Four main factors were obtained from the factor load matrix.

youdao