许多学校实行了教授分级制，教授分级制的初衷或许在于激励教授们勤勉于学、励志于事。
Many universities have put into practice the professor rank system, whose original aim lies in encouraging professors to study and work diligently.
但是，游戏产业先发制人，Dyson说，创建了娱乐软件分级制度，例如给一些游戏评为E级，代表老少皆宜的游戏。
The video game industry responded, Dyson says, and in a preemptive move created the Entertainment Software rating Board, which generates game ratings such as "e for Everyone."
但是，游戏产业先发制人，Dyson说，创建了娱乐软件分级制度，例如给一些游戏评为E级，代表老少皆宜的游戏。
The video game industry responded, Dyson says, and in a preemptive move created the Entertainment Software rating Board, which generates game ratings such as "e for Everyone."
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