If teachers will be grading your work or leading you in online discussions, it is important that they have the knowledge necessary to do the job.
如果是由老师指导你的学习以及引导你在线讨论，那么，他们是否有做好这份工作的必要知识就是很重要的事情。
The noise hazard is the bigger harmful factor of occupation job grading in Thermal power plant.
噪声是电力行业比较突出、影响较大的职业性有害因素。
This method is also known as job grading.
这种方法被认为是一种工作等级划分。
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