If the water's cloudy like that, it'll be hard to see anyone underwater.
如果水浑浊成那样，就很难看得到水下的人。
A topic-based approach can be hard to assess in schools with a typical spread of ability.
在以典型的能力多元化为特征的学校里很难评估一种基于话题的教学方法。
With such busy lives, it can be hard to try and find the time to work out.
在如此忙碌的生活中，很难找到时间去锻炼。
Food safety is another problem: it can be hard to know where the food comes from.
食品安全是另外一个问题：很难知道食品来源。
I do get real speaking roles, but work can be hard to come by if you're not a popular star.
我的确拿到了有台词的角色，但如果不是人气明星，可能很难拿到这份工作。
If the sea animals eat them by mistake, the rubbish will be hard to digest and stay in their stomachs forever.
如果海洋动物不小心吃了它们，垃圾很难被它们消化，会永远留在它们的胃里。
It is also the key to understanding the thoughts and feelings that common people have, which may be hard to express.
它也是理解普通人难以表达的想法和感受的关键。
At the back, students probably won't speak much, but in big classrooms, it can be hard to see the board and hear what the teacher is saying.
坐在后排的学生可能不会讲太多，但在大教室里，可能很难看到黑板，也很难听到老师在说什么。
It can be hard to identify which parcels are carrying crucial items such as Social Security checks, but USPS and UPS try their best to prioritize sensitive material.
虽然很难辨别哪些包裹里装的是社会保障支票等重要物品，但美国邮政（USPS）和联合包裹服务公司（UPS）会尽其所能优先处理敏感材料。
It will be hard to work today—specially when it's so warm and sunny outside.
今天无心工作—尤其是外面这样风和日丽。
"Very well," he thought, "let them bury it there; it won't be hard to find."
“很好，”他想，“让他们把它埋在那儿吧。这并不难找。”
These will be hard to maintain.
这些管线很难维修。
Which may be hard to accomplish.
这些实践也许很难完成。
Any criticism can be hard to accept.
任何的批评都很难接受。
It may be hard to motivate yourself.
要激励自己坚持可能很难。
Such a reaction may be hard to change.
这种反应可能很难改变。
The ayatollah will be hard to replace.
这位教长很难被替代。
Sure, it'll be hard to get started.
当然，一开始会有些难。
Data on such matters can be hard to get.
此类事件的具体数据难以获得。
With luck they will be hard to vandalise.
幸运的是，它们也很难被弄坏。
Yet an FMCT will still be hard to achieve.
但是一个禁产条约仍将难以达成。
But further closures will be hard to avoid.
但更多的工厂倒闭将难以避免。
Prices vary and can be hard to compare.
价格在改变且难于比较。
But their provocations can be hard to resist.
但他们的挑衅是很难持续下去的。
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