They rejected a demand for the removal of all nuclear weapons.
他们拒绝了清除所有核武器的要求。
That is the reason why they are popular and in demand all over the world.
这就是为什么他们是受欢迎和需求在世界各地。
Above all, scientists demand to know when and where they are wrong.
最重要的是，科学家应该知道他们是在何时、何处错了。
Above all, scientists demand to know when and where they are wrong.
最重要的是，科学家应该知道他们是在何时、何处错了。
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