But that does not mean that more effective checks on the mentally unstable are impossible, or that restrictions on the killing power of what can be sold are doomed to failure.
但是那并不意味着对于一些精神失常的人，在枪支使用方面的有效控制是不可能的，或是对于何种枪支可供出售的限制注定会失败。
The US can expect to be the sole superpower for some time yet, if we mean by the term a state capable of deploying effective power almost anywhere in the world.
美国仍可以指望在一段时间内作为唯一的超级强权，如果我们衡量的条件是一个国家是否能在几乎全世界各地都部署有效力量。
The effective shear stress not only generalizes the flow intensity but also summarizes the flow intensities of mean flow velocity, stream power and unit stream power.
这一有效切应力不但是对切应力类水流强度指标的总结，还可以概括平均流速和水流功率等水流强度指标。
The effective shear stress not only generalizes the flow intensity but also summarizes the flow intensities of mean flow velocity, stream power and unit stream power.
这一有效切应力不但是对切应力类水流强度指标的总结，还可以概括平均流速和水流功率等水流强度指标。
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