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Khan Academy timestamps

Adds time duration labels near each lesson title

这些是代码更新过的版本。 显示所有版本

  • v1.3 2016-07-04
  • v1.2 2016-07-01
  • v1.1 2016-06-29 Timestamps are added in lesson page, not only in ToC
  • v1.0 2016-06-28
  • v0.1 2016-06-27