The mystery of the disappearance of the flight MH370 remains
unsolved to this day.
马航MH370失踪的谜团至今仍未解开。
The murder case from 20 years ago is still an
unsolved enigma for the local police.
二十年前的那起谋杀案对当地警方来说仍是一个未解之谜。
The identity of Jack the Ripper, one of the most infamous serial killers in history, remains
unsolved.
历史上最臭名昭著的连环杀手之一“开膛手杰克”的真实身份至今仍是个谜。
The cause of the sudden power outage during the Super Bowl is an
unsolved technical issue.
超级碗期间突然停电的原因是一个尚未解决的技术问题。
The mathematical proof of the Riemann Hypothesis, a centuries-old problem, is still considered
unsolved.
几百年来，黎曼猜想的数学证明依旧是一个未解的问题。
The origin of dark matter in the universe is an astronomical puzzle that remains
unsolved.
宇宙中暗物质的起源仍然是一个未解的天文学难题。
The fate of the lost Roanoke Colony, the first English settlement in North America, is an
unsolved historical mystery.
北美第一个英国殖民地罗阿诺克的消失，是一个未解的历史之谜。
The true authorship of Shakespeare's plays continues to be an
unsolved literary controversy.
关于莎士比亚戏剧的真实作者身份，依然是一个未决的文学争议。
The mystery behind the Bermuda Triangle, with its numerous unexplained disappearances, remains
unsolved.
有着众多未解失踪事件的百慕大三角区的谜团，至今仍未解开。
The reason behind the sudden extinction of dinosaurs is an
unsolved question in paleontology.
恐龙突然灭绝的原因在古生物学中仍然是一个未解之谜。
Additionally, unsolved offline problems will not disappear magically in an online marketplace.
The CCCEU, speaking on behalf of some 1,000 Chinese companies operating in the EU, said in the statement that some issues remained unsolved.
However, the field of life sciences is complicated, and issues such as technology bottlenecks, products and talent remain unsolved.
It is true that leaving the problem of high leveraging unsolved will lead to tremendous hidden dangers and risks.
In terms of social attributes, data cannot be protected using the original path of traditional property rights, and the production relationship of data is also very complicated, which aggravates the complexity and ambiguity of data rights, which is also an unsolved problem.
On the one hand, demand declined owing to unsolved real estate problems.
Zeng Gang, director of banking research at the Chinese Academy of Social Sciences' Institute of Finance and Banking, said the efforts to maintain financial order have achieved significant results, but some deep problems remain unsolved.
Some application-oriented basic research has not really focused on application demand, leaving practical problems unsolved.
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