I leant over the rail of the open-sided observation car to feel the cool of the air against my face. I let my thoughts drift, lulled by the sluggish rhythm of our progress.
我倚靠在敞篷观光车的栏杆上，感受着吹到我脸上的清冷空气，火车缓慢的行进节奏让我思绪纷飞。
The practice of bolt support in reserved coal drift in mining pressure area is introduced, helpful conclusion is obtained through observation and analyse.
介绍了煤巷锚杆支护在动压区留巷的实践，并通过观测及数据分析，得出了有借鉴意义的结论。
Because in U-I model flux observation pure integration element is adopted, it brings about two problems of DC drift error and initial integration error.
考虑到U - I模型磁链观测器含有纯积分电路，会带来两个问题：一是直流漂移误差，二是积分初值误差。
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