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。

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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。

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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。

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Herein, however, lies the dilemma: Creativity is what we need to help us get through times of greatest uncertainty and difficulty.

CNN: Is there a bias against creativity?

She said this was compounded by having to deal with the challenge and uncertainty around complaints and difficulty finding locums, adding that GPs were taking early retirement or changing profession due to the problems.

BBC: Stressed doctor - photo posed by model