springboards
n.
（有助于成功的）跳板( springboard的名词复数 );
（跳水、体操等体育运动中的）跳板，踏板;
例句:
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Dives are made from either springboards or platforms.
来自BBC
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Slums "are economic springboards," he said.
来自WSJ
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The springboards are 1 meter and 3 meters high.
跳板分1米和3米两种高度.
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The springboards are 1 metre and 3 metres high.
跳板的高度是1米和3米.
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How high are the springboards?
跳板的高度是多少?