Its subject and the enclosure and performance of connecting equipment have essential influence on the economic performance of the whole power system.
其主体及其附件和连接设备的性能对整个电力系统的经济性能有至关重要的影响。
In the process teaching of PE, it is essential to have full know-ledge of influence of the teaching environment on PE teaching activities.
在体育教学过程中，要充分认识到环境因素对体育教学活动的影响。
Participation in discussion is essential to the life of the class and the force and cogency of students' remarks will have a marked influence on grades.
参与分组讨论是基本的上课方式，并且也是评量同学成绩的标准之一。
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