求翻译：网络教学比较灵活，学生可以通过网络工具向老师提问、与同学讨论问题。网络教育则是面向大众的，教育的门槛被降低，接受教育的机会大幅度地增加。但是老师无法对学生的行为进行有效的监督。是什么意思？

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Network teaching more flexible, students can be accessed over the Network tool to teachers and students ask questions and discussion of the issues. Network education is available to the public and the educational thresholds will be lowered, the opportunity to receive education increase substantially

The network teaching quite is flexible, the student may inquire through the network tool to teacher, discusses the issue with schoolmate.The network education faces the populace, the education threshold is reduced, accepts the education the opportunity to increase large scale.But teacher is unable t

Teaching more flexible network, students can use the Web tools to teachers, and students to discuss the problem. Online education is public education threshold is lowered, access to education substantially increases. But the teacher was unable to conduct effective oversight of the student.

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