The primary /leading reason /cause is that… …can be another reason. A further reason is that…

主要原因是…… 。……也可能是另一个原因。第三个原因是……

youdao

Now we're making foundations for the recovering patients, cause for some reason we can't find any explanations for the contaminations.

VOA: special.2009.04.17

Helen chose you without reason because she loves you without cause; embrace her without question and watch your weather change. Let go.

海伦毫无理性地选择了你，因为她对你的爱,也无原因，别问什么，拥抱她,看着你的境遇变迁，放开。

耶鲁公开课 - 1945年后的美国小说课程节选

We're exposed to things that might cause cancer where weren't exposed to them before and so that might be a reason.

我们暴露于可能致癌的物质中,这些物质在以前是没有的,这可能就是原因之一

耶鲁公开课 - 生物医学工程探索课程节选

Dr Leonard Sax, the founder of the National Association for the Advancement of Single Sex Public Education, even claims a neurological reason for his cause: girls and boys mature at different rates, so they need different teaching methods.

ECONOMIST: An idea that may be worth trying

Police were free to employ the tactic for any reason without showing probable cause to a magistrate and getting a search warrant, the government said.

WSJ: Supreme Court Reins In Police on GPS Trackers

He said that, while the reason why obesity might cause such problems was not clear, it was possible that it increased inflammation, harming the chances of a successful pregnancy.

BBC: Obesity 'raises miscarriage risk'