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1·Some of the most important questions remain unanswered.

一些最重要的问题仍未被答复。《柯林斯英汉双解大词典》

2·Many questions about the crime remain unanswered.

这桩罪行涉及的许多问题仍然没有答案。《牛津词典》

3·The key question of what caused the leak remains unanswered.

泄漏究竟是怎么造成的，这一关键问题仍未得到答案。《牛津词典》

4·The report of the judges leaves a lot of unanswered questions.

法官们的报告留下了许多没有回答的问题。《柯林斯英汉双解大词典》

5·There were some holes in that theory, some unanswered questions.

那个理论中有些漏洞，一些没有得到解答的问题。《柯林斯英汉双解大词典》

6·I handed in my test and the last question was left unanswered—hoping the final result wouldn't be influenced too badly because of it.

我交了试卷，最后一个问题没有回答——希望最后的结果不会因为这个而受到太大影响。

7·Despite the appeals court's decision, big questions remain unanswered.

尽管上诉法院做出了裁决，但一些重大问题悬而未决。

8·There are still a lot of unanswered questions in this area, but fish and seafood are a major part of the Mediterranean diet.

这个领域仍然存在很多无法回答的问题，但是鱼类和海鲜是地中海饮食的一个主要部分。

9·When students feel isolated or confused and reach out with questions that go unanswered, their motivation to continue begins to fade.

当学生感到孤立或困惑，他们提出的问题没有被回答时，他们继续学习的动力就开始减弱。

10·Confusion consequently reigns over a broad spectrum of unanswered questions dealing with avian origins and the biology of dinosaurs and early birds.

因此，关于鸟类的起源、恐龙和早期鸟类的生物学特性等一系列未解之谜都笼罩在困惑之中。