Complications secondary to shock is a challenging problem in clinical practice.
各种原因引起的休克之后出现的并发症一直是困扰临床的问题。
How to describe the brittle failure process for geomaterials is a challenging problem.
对岩土材料的脆性破坏过程进行正确描述是很困难的。
Have a difficult or challenging task or problem to deal with.
有困难的或挑战性的或问题需要处理应对。
Have a difficult or challenging task or problem to deal with.
有困难的或挑战性的或问题需要处理应对。
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