In most low-income countries, especially in Africa, the magnitude of the problem is unknown, as this form of TB is so difficult to diagnose.
在大多数低收入国家，特别是在非洲，由于这种形式的结核病难以诊断，问题的严重程度尚不得而知。
It is a world difficult problem that the protein feed is insufficient, so developing compound protein feeds is one of the effective ways to solving this problem.
蛋白质饲料不足是世界性难题，研制复合蛋白饲料是解决这一问题的有效途径之一。
In addition, by analyzing the difficult problem on "You are a vessel" and "not mere vessel", we come to recognize that this so-called poser maybe not exist.
另外，通过对《论语》中“汝器”与“不器”的难题略作分析，我们认为这个所谓的难题也许并不存在。
During my last project, we ran into a difficult problem. This was high priority so everyone was instructed to find a solution.
在我最后的项目，我们遇到了一个难题，这是高度优先事项，使每个人都奉命寻找解决办法。
We are starting the drug 10, 15 years after the problem started, so it's very difficult to recover lung capacity once you've damaged the lungs all this time.
而且是在罹患哮喘10、15年后，才开始应用该药，因此很难一次就恢复长期哮喘对肺容量造成的损害。
The former staffs solved this kind of problem depend upon the experience and the simple computation, so it's very difficult to choose a more reasonable plan.
以往工作人员多依靠经验和简单的计算来解决这类问题，很难挑选出较为合理的方案。
The former staffs solved this kind of problem depend upon the experience and the simple computation, so it's very difficult to choose a more reasonable plan.
以往工作人员多依靠经验和简单的计算来解决这类问题，很难挑选出较为合理的方案。
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