Secondly, in order to avoid fire in our dormitory, we should not use any electric device without permission.
其次，为了避免在我们宿舍发生火灾，我们不应该使用任何未经许可的电子设备。
In other words, we should not use up our natural resources just to meet our own present day needs, while ignoring the future of our planet.
换句话说，我们不应该仅为满足我们自己当前的需要而用尽所有的自然资源，忽视我们后代的需求。
As with any preprocessor variable ( Section 2.9.2, p. 71) we should not use the name NULL for our own variables.
正如其他的预处理器变量一样（第2.9.2 节），不可以使用NULL这个标识符给自定义的变量命名。
The resistant groups of Culex pipiens pallens against DDVP have increased, so we should not use DDVP in the coming days.
结论：对敌敌畏的抗性种群已广泛产生，应限制使用。
The resistant groups of Culex pipiens pallens against DDVP have increased, so we should not use DDVP in the coming days.
结论：对敌敌畏的抗性种群已广泛产生，应限制使用。
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