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One Lascaux narrative picture, which shows a man with a birdlike head and a wounded animal, would seem to lend credence to this third opinion, but there is still much that remains unexplained.

一幅拉斯科岩洞叙事画描绘了一个头部像鸟的人和一只受伤的动物的故事，这似乎证实了第三种观点，但仍有许多未解之谜。

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The drug is still widely used as a first-line treatment for anovulation and unexplained infertility, even though a 2008 study raised serious questions about whether it does much about the latter.

而这种药物仍然作为治疗不排卵或原因不明的不育症的一线药物，尽管，一份2008年研究报告曾经对这种药物对原因不明的不育症是否真的有效果，提出质疑。

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The Cheonan incident refers to the unexplained sinking of a South Korean navy ship in March.

VOA: standard.2010.05.03

"There should be nothing in the crib but the baby, " says Rachel Moon, who heads the AAP's task force on Sudden Infant Death Syndrome (SIDS), officially any death of a baby under age 1 that remains unexplained after a thorough investigation.

WSJ: When a Cuddly Crib Puts the Baby in Danger

Det Insp Hannah Willard said the death was being treated as unexplained until a post-mortem examination established the cause.

BBC: Hastings hospital pond body believed to be Gary Baker

They said unexplained fatigue was a common problem in doctors' surgeries, but it was as yet unknown whether iron supplements could help these women.

BBC: Iron pills may help women beat fatigue