It is difficult to discern the motive of this seemingly arbitrary attack.
这种看上去随心所欲的攻击很难看出其动机。
Due to many factors affecting pipeline safety, it is difficult to discern pipeline risk and predict accident consequence.
影响管道安全的因素很多，事故的风险识别及事故后果的预测存在一定难度。
With Twitter especially, it is difficult to discern where links are going due to the 140 character limit and the use of services that shorten URLs.
尤其对t witter用户而言，很难通过140个字符辨别链接内容，更何况还有很多链接缩写服务。
It is often difficult to discern how widespread public support is.
了解公众支持的广泛程度常常是困难的。
Viewing even our small example without reference to the state diagram, it is quite difficult to discern the order in which methods should be invoked.
如果没有状态图供参考，即使查看我们的这个小示例，也非常难于分清方法应该按照何种顺序进行调用。
People who thrive on stress tend to feel it as their natural state, making it more difficult to discern stress symptoms until after much of their stress is alleviated.
正在承受压力的人往往认为这是他们的自然状态，这样会让他们很难意识到压力的征兆，直到大部分压力都减轻之后才有所察觉。
Although it is clear that the hukou system as a tool of social control is obsolete, the impact of “hukou re-unification” is much more difficult to discern.
尽管户口制度作为控制工具已经无法适应时代的需要这一点已经很清晰了，“户口重新统一”带来的冲击却很难被看清楚。
It is often difficult to discern the truth of an event from a newspaper report.
要从报纸的报道上去辨明一个事件的真实性很困难。
It is often difficult to discern the truth of an event from a news paper report.
要从报纸的报导上去辨明一个事件的真实性是困难的。
This plan is beyond the enemy's range of expectation, and it will be very difficult for him to discern it before you complete your final dispositions.
此种计划出敌意外，在你们最后完成部署以前，敌人是很难觉察出来的。
At other times, the magic is so integrated into the Wizarding World that it's difficult to discern what it is exactly.
其他的时候，魔法会极为完美的融合进巫术世界，很难识别出它到底是什么。
Although difficult to discern from the tables, it is industry opinion that in the recent past, new and, therefore, more competitive production has been developed.
虽然从表格中很难看出，但是从工业的角度来说在最近一段时间内，更多有竞争实力的产品在(蓬勃)发展。
Although difficult to discern from the tables, it is industry opinion that in the recent past, new and, therefore, more competitive production has been developed.
虽然从表格中很难看出，但是从工业的角度来说在最近一段时间内，更多有竞争实力的产品在(蓬勃)发展。
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