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1·He died in unexplained circumstances.

他死因不明。《牛津词典》

2·An unexplained death is difficult to come to terms with.

原因不明的死亡是难以接受的。《柯林斯英汉双解大词典》

3·The city's water supply has been cut for unexplained reasons.

城市的供水被莫名其妙地切断了。《柯林斯英汉双解大词典》

4·They realized that the official explanation left facts unexplained.

他们意识到那个对外宣称的解释没有对事实做出解释。《柯林斯英汉双解大词典》

5·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。

6·The crash is unexplained by the discipline of economics.

飞机坠毁原因不明，是由经济学的学科。

7·But sudden, unexplained weight loss can be even more worrisome.

不过原因不明的体重突降也许更值得担。

8·One of the country's grand old gunmen dies in an unexplained fire.

一名伟大的军人死于一场无法解释的火灾。

9·Unexplained trend maybe due to warming, natural cycles, expert says.

专家认为，这个暂无法解释的趋势可能与气候变暖和自然环流有关。

10·After investigation, around 5 per cent of reports remain unexplained.

经过调查后，约有5%的报告仍旧悬而未决。