The base will serve as a jumping-off point for troops going out into the country areas.

基地将作为军队进入乡村地区的出发地。

《柯林斯英汉双解大词典》

At the end of twenty steps the corridor ended in a jumping-off place.

走了二十步，通道往下到了尽头。

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They went on, and presently entered and followed Tom's other corridor until they reached the jumping-off place.

他们继续往前走，不一会就走了进去，沿着汤姆的另一条通道，一直走到低洼处。

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In addition to its historical appeal, Pangani is a convenient jumping-off point for many other nearby attractions.

BBC: Tanzania without the crowds

"The best kind of knockoff show just uses an existing idea as a jumping-off point, " Dehnart said.

CNN: Where's the originality in reality TV?

Like Poland and Hungary, the Czech Republic is a jumping-off point for illegal immigration into the European Union.

ECONOMIST: Plenty of muck, not much money