The flying saucer is yet an unsolved mystery.
飛碟仍然是未解之謎。
And keeping the satellite's huge beam and the distant rectenna reliably synced up also stands as an unsolved technical issue.
而要使衛星發射出來的巨大微波束與地面的網格形天線一直保持同步，也是一個尚未解決的技術難題。
Another problem of minimality also remains unsolved—to wit, what is the smallest number of digits a puzzle maker can place in a starting grid and still guarantee a unique solution?
另外還有一類「極小」的問題也還沒有解決：在保證有唯一解的條件下，一個初盤至少需要幾個數字？
The unsolved mystery baffled investigators for years.
這個未解之謎困擾了調查人員多年。
There are many unsolved problems in the field of science.
科學領域中有許多未解之謎。
The case remains unsolved despite extensive investigations.
儘管進行了大量調查，但這個案件仍未解決。
The unsolved crime haunted the small town for decades.
這起未解之案困擾了小鎮數十年。
The unsolved puzzle left everyone scratching their heads.
這個未解之謎讓每個人都百思不得其解。
The unsolved murder case was reopened after new evidence came to light.
新證據浮出水面後，這起未解謀殺案被重新調查。
The unsolved equation stumped even the most brilliant mathematicians.
這個未解方程連最聰明的數學家都束手無策。
The unsolved disappearance of the hiker sparked widespread concern.
這名徒步者的失蹤案件引發了廣泛關注。
The unsolved riddle continued to perplex scholars for generations.
這個未解之謎繼續困擾學者們數代。
Despite numerous attempts, the code remained unsolved.
儘管有過多次嘗試，這個密碼仍未破解。
The flying saucer is yet an unsolved mystery.
飛碟仍然是未解之謎。
And keeping the satellite's huge beam and the distant rectenna reliably synced up also stands as an unsolved technical issue.
而要使衛星發射出來的巨大微波束與地面的網格形天線一直保持同步，也是一個尚未解決的技術難題。
Another problem of minimality also remains unsolved—to wit, what is the smallest number of digits a puzzle maker can place in a starting grid and still guarantee a unique solution?
另外還有一類「極小」的問題也還沒有解決：在保證有唯一解的條件下，一個初盤至少需要幾個數字？
The unsolved mystery baffled investigators for years.
這個未解之謎困擾了調查人員多年。
There are many unsolved problems in the field of science.
科學領域中有許多未解之謎。
The case remains unsolved despite extensive investigations.
儘管進行了大量調查，但這個案件仍未解決。
The unsolved crime haunted the small town for decades.
這起未解之案困擾了小鎮數十年。
The unsolved puzzle left everyone scratching their heads.
這個未解之謎讓每個人都百思不得其解。
The unsolved murder case was reopened after new evidence came to light.
新證據浮出水面後，這起未解謀殺案被重新調查。
The unsolved equation stumped even the most brilliant mathematicians.
這個未解方程連最聰明的數學家都束手無策。
The unsolved disappearance of the hiker sparked widespread concern.
這名徒步者的失蹤案件引發了廣泛關注。
The unsolved riddle continued to perplex scholars for generations.
這個未解之謎繼續困擾學者們數代。
Despite numerous attempts, the code remained unsolved.
儘管有過多次嘗試，這個密碼仍未破解。
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