What's scary, though, is that it's not clear what causes ms or when its symptoms will strike.
然而可怕的是，你根本不清楚多发性硬化症有哪些病因，相关症状又会在什么时候发作。
Compare with the general road, expressway have a clear differential benefit, the causes of road users to choose the expressway from its time-saving, cost-saving and comfort.
高速公路与普通道路相比，具有明显的级差效益，道路使用者选择高速公路的原因来自于其时间上的节约、车辆行驶成本的节约及舒适性的提高。
It is clear that understanding the nature of this agent and how it causes such horrible diseases will shed new light on the interaction of a mysterious pathogen with its host.
很明确，研究这种传染源的性质和它是如何引起如此可怕的疾病的将有助于了解神秘的病原体与其宿主相互作用。
To recover a deformed metal tank, the causes resulting in its deformation must be made clear beforehand, then specific method might be taken for specific deformation.
要整修好金属油罐的变形，必须事先弄清变形原因，而后针对不同情况采取不同的修整方法。
Rheumatoid arthritis (RA) is a chronic inflammatory disease. Despite its clear genetic basis, the genetic causes of RA remain poorly defined.
类风湿关节炎(RA)是一种慢性炎症疾病，尽管已经明确该病具有基因学背景，但仍知之甚少。
The third part has a clear state for the main problems to restrict the realization of the Party organization function for city community currently, and also makes an analysis for its causes.
第三部分阐述了当前制约城市社区党组织功能实现的主要问题，并结合问题分析其成因。
Because of the complexity of its pathogenesis, the exact causes of GCA are still not clear.
GCA的发病机制错综复杂，目前尚未完全明确。
The blasting construction of small clear distance tunnel inevitably causes accumulative damage of surrounding rocks and its mechanical behaviors will be degenerated.
小净距隧道的爆破施工不可避免地造成围岩累计损伤，岩体力学性能劣化。
The blasting construction of small clear distance tunnel inevitably causes accumulative damage of surrounding rocks and its mechanical behaviors will be degenerated.
小净距隧道的爆破施工不可避免地造成围岩累计损伤，岩体力学性能劣化。
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