It is difficult to measure the success of the campaign at this stage.

在现阶段还难以估量这场运动的成败。

《牛津词典》

If the beta customer identifies critical usability or missing functionality at this stage, you have a difficult decision: release with the critical defect or delay the release in order to redesign.

如果在此阶段测试客户鉴别出关键的可用性或丢失的功能，那么您就面临困难的决策：发布带有关键缺陷的版本，还是推迟发布重新设计。

youdao

"However, it's very difficult to quantify the human health impact at this stage," he said.

“尽管如此，在现阶段还很难量化其对人类健康的影响。”他说。

youdao

In a trading update the group said "after a year of strong growth in 2012, the economic environment we will be facing in 2013 is particularly uncertain in many of our markets and it is difficult at this stage to provide a definitive view of the likely pattern of trading in 2013".

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"The broader macroeconomic impact will clearly be substantial but the details are difficult to assess at this early stage, " the IMF said.

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"At this stage then it becomes acutely difficult, if not quite impossible, to set a budget and precept which is acceptable without causing a severe level of disappointment within the police service, difficulties amongst our partners and anger from the public that we exist to serve, " Mr Michael said.

BBC: Alun Michael