很难保持专注。
发达国家很难保持人口规模。
It would be difficult for developed countries to maintain the size of population.
一些移民拥护者担心，经济困难会令当地人很难保住工作。
Some immigrant advocates worry that hard financial times make it more difficult for natives to keep jobs.
在他的课上，许多学生如果不先喝一杯咖啡，就很难保持清醒。
Well, many students could hardly stay awake in his class without first drinking a cup of coffee.
网络捐款者也趋向于更难保留。
素食越是严格，就越难保证身体需要的营养。
The more restrictive a diet is, the more difficult it is to get all the nutrients your body needs.
当不希望的事情发生时，我也很难保持乐观平和。
It's very difficult to stay positive and balanced when things you don't expect happen.
很多用保姆的人都是银行从业者，而现在，他们已经自身难保。
Many of the people who employ nannies are bankers and they are suffering now," she added.
如果你不计划时间进行锻炼并全心投入，你就很难保持积极性。
If you don't plan time for exercise and dedicate yourself to it, it's hard to stay motivated.
我们知道有一段时间频率非常强烈自然，以至于很难保持平衡。
And we know that there have been times when the frequencies have been of such a strong nature that the balance has been difficult at times to hold.
船上落后的制冷系统很难保存水果和蔬菜，有时引起船员们不满。
And poor refrigeration on its ships makes it hard to preserve fruit and vegetables, something that makes for griping on board.
她对自己品牌如此的警惕，很难保证在动荡噪杂的媒体市场取得成功。
Such vigilance about her brand is hardly a guarantee of success in the volatile and cacophonous media market.
苹果可能是我们最爱的水果之一，但它们放久了便很难保持爽脆口感。
Apples may be among our favourite fruits, but they rarely stay crispy for long enough.
在这种情况下，我们很难保持积极，而不由自主地对对方作出消极反应。
In such situations, it may be difficult to stay positive. We may be inclined to react negatively to them.
销售的突然下降将让他们没有现金，同时银行透支额也很难保证或增加。
A sudden fall in sales will leave them without cash at a time when bank overdrafts are hard to secure or to increase.
有时候灾难保险的费用高得令人咂舌，但灾害是否会发生还是未知之数。
Sometimes the price of catastrophic insurance is chokingly high while the risk remains remote.
就算我们今天顺利庆贺了，难保以后朋友发现了宝马的缺点而又想换车。
Even if our celebration today would have gone on smoothly, it is hard to say that my friend would not find demerits from her BMW later and want to change a new car once more.
最糟糕的是土壤物理结构的变化，如果表层土壤侵蚀，土壤更难保水保肥。
Worst of all, the physical structure changes if the top soil erodes, making it harder for the land to retain water or fertiliser.
如若发电站、精炼厂、银行和空中交通管制系统被迫瘫痪，人们便性命难保。
If power stations, refineries, Banks and air-traffic-control systems were brought down, people would lose their lives.
想到曾经独自一个人值夜班时他说：“我觉得很难保持清醒，非常非常难。”
"It was very difficult to stay awake, extremely difficult," he said recalling his time on the overnight shift when he was usually the only one on duty.
增加就业和降低就业很难保持完全平衡，但是结果远不是像看上去的那样清晰。
The ultimate balance between jobs created and killed is difficult to pin down, but the net result is far murkier than it might seem.
他们自己事业的大部分工作都在5点之后完成，而这段时间很难保持工作热情。
The majority of the work on their own business will be done after 5pm and it is hard to stay enthusiastic and inspired at this time.
继2000个游戏之后，第2001个游戏是很难保持原样，确实，“他说。”
“After 2,000 games, it's hard to make the 2,001st game on the same lines, sure,” he says.
她怀疑缺乏权力的人遭受到不利的认知效果导致很难保持集中注意力去完成任务。
Instead, she suspects that those lacking in power suffered adverse cognitive effects from that very lack, and thus had difficulty maintaining their focus on the tasks.
然而，在美国金融市场继续以惊人的速度下跌时，人们可能很难保持耐心和平静。
Schumer was speaking on NBC's Meet The Press program. But patience and calm nerves may be hard to find at a time when U.S. financial markets continue to drop at alarming rates.
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。”
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。”
Nothing is easy here, progress is difficult to achieve and it is difficult to sustain and build on.
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