From then on, I managed to change myself and the former method of passive study, and applied English into living, let it bring me happiness.
后来我尝试着去改变自己，改变原来被动的学习的方法，将英语运用到生活中去，让英语给我的生活带来快乐。
The method of System Dynamics was used to study the dynamic change trend of many natural resources and environment in the Yellow River delta.
用系统动力学方法研究了黄河三角洲地区多种资源和环境的动态变化趋势。
Objective: To study the reason of the different pathologic change of the same patella joint, and the treatment method under the arthroscope.
目的：对同一髌股关节骨关节病关节镜下出现不同病理改变的成因及治疗进行初步探讨。
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