参考词典中jumping-off point的常规释义：
基本释义
英英解释
- a beginning from which an enterprise is launched
[同]
jumping-off point, point of departure, springboard
[例]
- he uses other people's ideas as a springboard for his own
- reality provides the jumping-off point for his illusions
- the point of departure of international comparison cannot be an institution but must
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