"Difficult" patients have the temerity to challenge their doctors' decisions.
“难缠”的病号会冒然挑战他们的医生的决定。
Like most students, when studying at middle school, I found math interesting but difficult, which was a challenge for me.
像大多数学生一样，读中学时，我觉得数学虽有趣但很难，这对我来说是一个挑战。
I think that it's true that the economy is difficult and there is a big challenge in front of us.
我认为经济形势确实很困难，我们面临着巨大的挑战。
When new or difficult material is presented, almost all listeners are faced with a challenge, because human's speech lacks the stability and permanence of the printed word.
当出现新的或困难的材料时，几乎所有的听众都面临着一个挑战，因为人类的语言缺乏印刷文字的稳定性和持久性。
"The challenge is if certain types of people are doing something, it's difficult for other people to break into it," said Po-Shen Loh, the head coach of last year's winning U.S. Math Olympiad team.
去年获胜的美国数学奥林匹克代表队的总教练罗博深说：“挑战在于，如果某些类型的人正在做某事，其他人就很难成功打入其中。”
It is a difficult task, but I'm sure he'll rise to the challenge.
任务很艰巨，不过我相信他能应付自如。
She began to tell us how her class was going to be difficult and that if we weren't up to the challenge, she would gladly let us leave.
她开始告诉我们，她的课将会变得多么困难，如果我们不能接受挑战，她会很高兴地让我们离开。
The engineers face a difficult challenge.
工程师们面临一个困难的挑战。
You can use a difficult challenge to become more patient, more relaxed, or just quicker to release frustration when you engage your emotional development at work.
你可以利用艰巨的挑战使自己变得更有耐心，更放松，或者是更快地发泄控制工作情绪时产生的挫折感。
A difficult challenge in the area of highly-parallel batch processing is operational control and managing the many jobs that are executing concurrently.
在高并行批处理领域中，比较困难的问题是操作控制，以及管理许多并发执行的作业。
A diagnosis before birth can pose a difficult challenge for couples as they decide whether to continue the pregnancy.
孩子出生前诊断是否患有唐氏综合症对于夫妇决定是否继续妊娠是一个非常困难的选择。
When facing a difficult challenge it's easy to quit. Don't quit until you achieve your goal.
当面对艰难挑战时很容易退却。不达到目标不要退却。
Achieving effective collaboration within a project team can be a difficult challenge for a co-located team, let alone a geographically distributed one.
在一个项目团队内部完成有效的协作对于一个共处一地的团队是一项很艰巨的挑战，所以就更不用对于一个地理上分布的团队了。
Now you have every opportunity to mould a team to your liking. What is the most difficult challenge?
你已经在F1混这么多年了，现在终于有机会在一个车队里作威作福，你觉得最困难的挑战对于你来说是啥？
There are more than 30 students here, ready to take on a difficult challenge for kids of their age.
这里有30多名学生，他们准备好接受一项对他们这个年龄的孩子来说很困难的挑战。
Probably the most difficult challenge is a distributed system must be able to continue operating correctly even when components fail.
其中最困难的可能是分布式系统必须在一些组件出现故障的情况下继续正常运行。
Perhaps the most difficult challenge is collecting the related code from multiple source files; development tools can greatly expedite this task.
或许最困难的挑战在于从多个源文件收集相关代码；开发工具可以极大地加快这个任务的进行。
For luxury fashion brands that pride themselves on elitism and inaccessibility, this may be the most difficult challenge in developing a social media strategy.
对于那些对自身的精英主义和高高在上引以为傲的时尚奢侈品牌来说，这可能是它们开展大众媒体策略的最大挑战。
This challenge is extremely difficult challenge.
这个挑战极其困难。
Bridging the two is a difficult challenge for many industries.
对于许多行业来说将其两者连接起来是很大的挑战。
When your confidence is high, even a difficult challenge will seem fun and exhilarating.
当你信心十足时，即使是非常艰巨的挑战在你看来也是非常有趣并振奋人心的。
HMIC names seven police forces that it says have the most difficult challenge in protecting the frontline.
HMIC指出七个面临保护前线最艰巨任务的警队。
The last few decades have seen a body of researchers attempt to rise to the difficult challenge of how to study 'happiness' in a systematic, empirical way.
近几十年中所看到的一个研究机构用一个系统的、实证的方式研究“幸福”，以试图提升对困难的挑战。
Well, it is a difficult challenge. But with the, I have the support of family and friends, this has been a, it has helped me quite a bit.
其实，这对我来说是一个很难的挑战，但是，家人和朋友的支持帮了我很大的忙。
Back problems are a difficult challenge for doctors in part because it is difficult to know when to operate.
背痛难题的治疗对于医生来说是个有难度的挑战，其部分原因是手术时机的抉择。
Back problems are a difficult challenge for doctors in part because it is difficult to know when to operate.
背痛难题的治疗对于医生来说是个有难度的挑战，其部分原因是手术时机的抉择。
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