So scientists have started looking for the cause of the auroral variations.

因此，科学家们已经开始寻找极光变化的原因。

youdao

Researchers have been looking for the cause or causes of attention deficit hyperactivity disorder.

研究人员一直在寻找多动症的原因。

youdao

When I'd found the pennies on the ground, I'd stopped looking for the cause of the noise Carol had heard.

先前在地上找到那两枚钱币后，我便停止寻找嘉璐听到的声音的来源了。

youdao

Researchers have been looking for the cause or causes of attention deficit hyperactivity disorder.

VOA: special.2009.09.29

Only after the search was complete which wasn't expected until later Wednesday morning would the site be released to investigators looking for the cause, Berardi said.

NPR: Cadaver Dogs Search After Kansas City Gas Blast

He was looking for a way to pinpoint the cause of recurrent fainting spells, which are sometimes induced by heart abnormalities.

FORBES: The Doctor Is In

From the White House perspective, what has that effort been like by various folks looking for a mention of their cause in the speech?

WHITEHOUSE: Press Briefing