This may make it more difficult to sustain initial results.
这可能使它更加难以维持了初步成效。
He found it difficult to sustain an interest in their talk.
他感到很难对他们的谈话保持兴趣。
He found it difficult to sustain good relationship with them.
他发现要与他们保持良好关系是很难的。
He seems to find it difficult to sustain relationships with women.
他发现很难保持同女人的关系。
He seems to find it difficult to sustain relationships with women.
他似乎很难维持与女性之间的关系。
For many reasons, it is difficult to sustain their friendship forever.
由于种种原因，戴良与宋濂的友谊很难维持下去。
He seems to find it difficult to sustain the relationship with the woman.
他发觉很难与这个女人长期维持关系。
Over the next few months, however, that tactic will be difficult to sustain.
然而在接下去的几个月这个策略将很难维持下去。
Nothing is easy here, progress is difficult to achieve and it is difficult to sustain and build on.
他说：“在这里，什么事都不容易，很难取得进展，而且很难保持和进一步推动。”
Abundance makes command relationships difficult to sustain and exchange relationships an almost pointless game.
富裕使得支配关系难以维系，也使得交易关系几乎无用。
The way the climate is changing - if it continues - it will be very difficult to sustain the nomadic way of living.
气候变化的方式- - -如果它继续干旱下去- - -将使游牧生活难以为继。
"It's going to be difficult to sustain a bull market, because there's a lack of full confidence in policymakers to get it right," says Kantor.
“要保持牛市状态会有一定的困难，原因在于决策者对自己是否能够做到正确面对缺乏充分的信心，”坎特如是说。
Not a bad fraction of what is needed, but one that it will be difficult to sustain in the face of the world's current economic difficulties.
这与所需资金相去不远，但面对当今的全球经济困境，这将是一个难于维持的数字。
Deserts would start encroaching along Europe's southern borders. British agriculture would be increasingly difficult to sustain as summer rainfall dropped.
欧洲南部有将开始被沙漠侵袭，英国的农业将因为夏季降雨量的减少而日益艰难。
Many of those who hope to reduce their weight are also confused about their optimal weight, the right approach and find it difficult to sustain weight loss.
许多那些希望减少重量的人同时也不清楚他们理想的体重以及正确的方法，所以觉得减重困难重重。
The motion of Automous Underwater Vehicle (AUV) changes obviously when it sails near surface under the influence of ocean waves, so it is difficult to sustain the depth.
智能水下机器人（AUV）在近水面的运动中，由于波浪干扰力的作用，运动状态会发生明显变化，其近水面的定深控制是比较困难的。
When the performer, painter or writer becomes bored, their work begins to show a lack of continuity in its appeal and it becomes difficult to sustain the attention of the public.
若表演者、画家或作家感到厌烦，他们的作品就难以继续保持以前的吸引力，也就难以保持公众的注意力。
When the performer, painter or writer becomes bored, their work begins to show a lack of continuity in its appeal and it becomes difficult to sustain the attention of the public.
若表演者、画家或作家感到无聊，他们的作品就难以继续保持以前的吸引力，也就难以保持公众的注意力。
Policy--Social marketing programs can do well in motivating individual behavior change, but that is difficult to sustain unless the environment they're in supports that change for the long run.
策略（Policy）--社会营销项目在激励个体行为改变方面很有效，但是维持这样的改变却是困难的，除非他们所处的环境长期支持这种改变。
While Radcliffe, now single and heading for the New York stage, has always had girlfriends since he was 14, Grint says he found it "quite difficult to sustain a relationship, because I was so busy."
虽然即将在纽约登台表演的雷德克里夫从14岁起就一直有女朋友，格林特却发现“想要维持一段恋情是很困难的，因为我总是很忙。
However, they have a difficult time making changes for many reasons: changes are hard to initiate and even harder to sustain; they take too long; and people resist them.
然而，他们很难有时间进行变革，因为：很难开始变革，也很难维持；他们花费了太长时间；但是人们还是抵抗变革。
But beating the market is an incredibly difficult trick to sustain.
但是要持续跑赢大市却是一件极其艰难的工作。
Most people want to change their lives, in some way, but find it difficult to either get started or to sustain the change for very long.
大多数人想要在一定程度上改变他们的生活，但发现改变既难以开始也不易维持很长时间。
That becomes a difficult feeling to sustain if we have already seen ourselves doing it.
如果我们已经发现自己正在做了，那就形成了一种难以继续下去的感觉。
Even though these economies are only just starting to feel the upturn, policymakers now face a difficult problem: how to sustain a robust recovery without blowing up bubbles.
尽管这些经济体的经济刚开始好转，但政策制定者现在面临难题：在避免经济泡沫的情况下如何保持经济的强劲反弹。
If money is kept to monetary phenomena, then anchoring the exchange value to a tradable index would not be difficult to attain and sustain.
把货币的用途限于货币现象，将汇率与一个可以成交的指数挂钩是不难维持的。
Conceivably, the ECB could act despite Bundesbank opposition, but in practice it is difficult to see how the central bank could sustain a credible intervention without the Germans on board.
可以想象得到，欧洲央行可以无视德国联邦银行的反对意见，不过，在实际操作中，我们很难看到，入股没有德国的参与，央行如何令人信服地持续干预。
Conceivably, the ECB could act despite Bundesbank opposition, but in practice it is difficult to see how the central bank could sustain a credible intervention without the Germans on board.
可以想象得到，欧洲央行可以无视德国联邦银行的反对意见，不过，在实际操作中，我们很难看到，入股没有德国的参与，央行如何令人信服地持续干预。
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