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.
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.
很难保持专注。
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.
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.
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.
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.
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.
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.
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.
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.
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.
除非嵌入文档和被嵌入文档使用相同的编码——这一点很难保证，否则就会出错。
Unless the embedding and embedded documents use the same encoding, which is almost impossible to guarantee, it won't work. See Listing 1 for an example of this error.
加班会增加疲劳减少与家人在一起的时间，以至于很难保持快乐也难以平衡工作与家庭。
Working overtime increases your level of fatigue and decreases time spent with your family, making happiness and work family balance difficult to maintain.
全球变冷将使空气更难保持海洋蒸发的水分，从而减少降雨量，使更多的地方面临干旱。
Global cooling meant that the air had less capacity to hold moisture from the oceans, leading to fewer rains and more arid climes.
报告指出，一些栖地和物种之所以被纳入栖地指令，是因为他们正面临着威胁，因而也更难保护。
The report notes that habitats and species in the habitats directive were chosen because they were under threat, and so were harder to conserve.
如果同时想达到二个或更多的目标，就很难保持精力和注意力（实现目标的二个最重要的因素）。
You cannot maintain energy and focus (the two most important things in accomplishing a goal) if you are trying to do two or more goals at once.
如果你看到一辆汽车推出四五年，销量都不是很好，那么它就很难保值，也很难跟对手竞争了。
If you see a vehicle that is in its fourth or fifth year and not doing well selling [new] retail, it would tend to not hold its value as well as its competitors.
假如你感到自己是出于必须的原因去做这样那样的工作，那么你在工作时就很难保持饶有兴趣的态度。
If you feel that necessity requires you to work at such-and-such a job, then it will be hard for you to maintain a playful attitude about that job.
尽管他承认，在商店门前睡了个不安稳的觉后，醒来时全身冰冷、潮湿、疲惫不堪，就很难保持积极性。
Although he admits that it's hard to keep motivated when you wake up cold, wet and shattered from a disturbed night in a shop doorway.
如果你觉得你取得了一定的进展(大概是在一月)，但是后来又发觉很难保持这股势头，你会看到新景象。
If you feel you've made some nice progress (possibly in January) but found it hard to keep the momentum going, you are looking at a whole new picture.
如果你觉得你取得了一定的进展(大概是在一月)，但是后来又发觉很难保持这股势头，你会看到新景象。
If you feel you've made some nice progress (possibly in January) but found it hard to keep the momentum going, you are looking at a whole new picture.
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