中国人从中东获得了一种蓝色颜料，这是一种当时在中国很难得到的纯净的氧化钴，这种颜料只含有少量的锰。
From the Middle East the Chinese acquired a blue pigment—a purified form of cobalt oxide unobtainable at that time in China—that contained only a low level of manganese.
爱是难以转化为，但很难得到的！
三维弹性问题的解析解是很难得到的。
Analytical solutions for three dimensional elasticity problems are quite difficult to obtain.
在沙漠里水是很难得到的。
真理总是很难得到的。
由于它大部分都不受监管，可靠的统计数据是很难得到的。
Since it is largely unregulated, reliable statistics are hard to come by.
我们想要高兴，但是我们却认为那是挣来的，应得的，很难得到的。
We want to be happy, but we think it should be earned or deserved or hard to come by.
可以是一间更好的办公室，一个很难得到的停车位，一个靠窗的座位，或者一台新电脑。
It can be a nicer office, a hard-to-get parking space, a seat next to a window or a new computer.
他们从好书中不但得到乐趣，而且受到很多教益，他们从中获得的那种精神食粮，从其它地方是很难得到的。
From good books, moreover, they draw much besides entertainment. They gain mental food such as few companions can supply.
过去，健康专家曾警告我们，即使是肺部感染或严重的咽喉痛等常见疾病，有一天也会很难得到医疗护理。
In the past, health experts warned us that the day would come in which it would become very difficult to provide medical care for even common problems such as lung infection or severe sour throat.
他们可能会发现自己的贡献很难得到认可。
They may find it hard to get their contributions recognized.
过去，健康专家曾警告我们，有一天，即使是肺部感染或严重的咽喉痛等常见疾病，也会很难得到医疗服务。
In the past, health experts warned us that the day would come in which it would become very difficult to provide medical care for even common problems, such as lung infection or severe sore throat.
从那以后，他觉得自己发现了一件神奇的事：要让一个男孩想要什么东西，你只需要让那个东西变得很难得到！
He thinks he has discovered something wonderful since then: to make a boy want something, all you have to do is make that something hard to get!
像天花这种东西很难得到但是其他的有机体也可能会变得很危险。
Something like smallpox is hard to get, but there are other organisms that could become harmful.
但是，贷款人很难得到贷款的比例在继续增长(见图表)。
But the percentage of would-be borrowers finding loans hard to get continues to grow (see chart).
作为欧盟居民的法国人可以没有任何官方登记即可搬到英国去，所以明确的数目很难得到。
Firm Numbers are hard to come by; as European Union (EU) citizens, the French can move to Britain without registering with any authority.
他们能接受的教育也非常有限，因此很难得到改善生活的机会。
Access to education is also very limited, and therefore they have very little opportunity to improve themselves.
在这么远的地方摔断了胳膊或腿将会很难得到帮助，但是更重要的是，他想有尊严地走进这个山谷。
A broken ankle or leg would be a serious thing this far from help, but it was more than that. He wanted to enter the gorge respectfully.
如果不付出这样的努力，将很难得到与你想要和期望的所相匹配的结果。
If you don't take this effort, it will be very difficult to obtain the results that match what you want and expect.
这些词很难得到排名也不能给你带来高质量的流量，把精力集中在那些相关的，但又不是特别通用的词上。
These words are incredibly difficult to rank for and won't drive qualified traffic to your site. Focus on words that are relevant, but not overly used.
和服务类似，很难得到一个大家一致认可的体系结构的定义。
Like services, it is difficult to find an agreed-upon definition of architecture.
仅从研究方程本身很难得到该函数行为的任何想法。
It is very difficult to obtain any idea about the behavior of this function simply from studying the equation.
但首相的幸运之处在于，对约翰逊的支持和信赖在短期内很难得到验证。
Fortunately for the prime minister, this faith in Mr Johnson is unlikely to be tested soon.
我们很难得到一个准确的数字，更不要说全球的新用户还在不断的快速增加。
But exact Numbers are hard to come by, not least because of the continued rapid growth in the global number of subscribers.
全球的统计数据很难得到，但是至少在美国，畜牧业造成的影响占到到水土流失的55%，杀虫剂使用的37%。
Global statistics are hard to come by, but in the us at least, livestock account for 55 per cent of soil erosion and 37 per cent of pesticide use.
全球的统计数据很难得到，但是至少在美国，畜牧业造成的影响占到到水土流失的55%，杀虫剂使用的37%。
Global statistics are hard to come by, but in the us at least, livestock account for 55 per cent of soil erosion and 37 per cent of pesticide use.
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