Among all the changes above, the concept of "free time" becomes clearly and the significance of it to the development of human gradually revealed.
正是在他世界观和自由观转变过程中，自由时间概念由模糊转向清晰，自由时间的对人类自由的重大意义也逐步显现出来。
Among all the changes above, the concept of "free time" becomes clearly and the significance of it to the development of human gradually revealed.
正是在他世界观和自由观转变过程中，自由时间概念由模糊转向清晰，自由时间的对人类自由的重大意义也逐步显现出来。
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