它安排在课外活动时间 It arranged in extra-curricular time ; It is scheduled extra-curricular activities
在户外活动 be outdoors for so long
霍金辐射由外在活动视界引发，因而就是这样理解的，由于它是热的不带有内部信息。
Hawking radiation originates just outside the event horizon and, so far as it is understood, does not carry information from its interior since it is thermal.
更进一步地说，在本例中，活动是需求的外在因素。
Further, in this example, the activity was an explicit element of the request.
听音乐就是一个内部价值取向的活动：我们听音乐是因为我们珍视这种行动，而非由于获取某种外在目标。
Listening to music is an example of an intrinsically valuable activity: we listen to music because we value doing so and not because of a certain external goal.
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