However, uncertainty about the quantitative effect of securities purchases increases the difficulty of calibrating and communicating policy responses.
不过，由无法量化证券购买的影响所引起的不确定性，增加了政策微调和政策沟通上的困难。
GIS uncertainty is a hotspot and difficulty of GIS theory. Although GIS uncertainty research has obtained abundant achievement, it still exists many problems.
GIS不确定性是GIS理论研究的一个热点和难点，虽然取得了丰富的成果，但仍然存在不少问题。
The theme of the Conference 'From Idea to Implementation' is very relevant in this period of difficulty and uncertainty.
大会的主题“从想法到实现”与这期间中的困难和不确定有很大关系。
These factors have uncertainty and variability by time, and bring large difficulty to forecast.
这些因素具有复杂的不确定性和时变性，给预测带来很大难度。
An air of uncertainty and impending difficulty surrounds the system and those associated with it…
不确定的氛围和迫近的困难环绕这系统和与之有关的人。
To the TV documentary works, because of the uncertainty and complexity of scene creation, difficulty of creation is very big and they often depend on the cameraman's thinking level even more.
对于电视纪实作品，由于是现场创作，难度很大，编导和摄像通常是一体的，它往往更依赖于摄像师的创作水平。
Rough set as a classify theory of data mining is a strong mathematic tool dealing with uncertainty and incompleteness, and it can overcome the difficulty in getting knowledge existed before.
粗糙集作为数据挖掘方法的一种，是一种处理不精确或不完整信息的强有力数学工具，并且可以克服以往存在的知识获取瓶颈。
Rough set as a classify theory of data mining is a strong mathematic tool dealing with uncertainty and incompleteness, and it can overcome the difficulty in getting knowledge existed before.
粗糙集作为数据挖掘方法的一种，是一种处理不精确或不完整信息的强有力数学工具，并且可以克服以往存在的知识获取瓶颈。
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