这桩罪行涉及的许多问题仍然没有答案。

Many questions about the crime remain unanswered.

《牛津词典》

喷洒杀虫剂导致的植物繁殖力下降是否真的会导致开花植物物种总数的下降，这个问题仍然没有答案。

The question of whether the decrease in plant fecundity caused by the spraying of pesticides actually causes a decline in the overall population of flowering plant species still remains unanswered.

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这个问题仍然没有答案；事实上，根据所有证据，我们不能基于恐龙骨骼对恐龙生理学做出一个明确的声明。

This question remains unanswered; indeed, taking all the evidence into account, one cannot make a definitive statement about dinosaur physiology on the basis of dinosaur bone.

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