The manifesto calls for a greater effort to recruit young scientists to fill the gap left by a wave of retirements expected over the next decade.

该声明呼吁加大力度招募年轻的科学家，以填补预期未来十年内一波退休高峰所留下的空缺。

Who can fill the gap?

谁来填补这一空白？

And third, show how to fill the gap.

第三，显示如何填补差距。

Pilotless drones can help fill the gap.

无人机能有助于填补该空缺。

Technology may be one way to fill the gap.

技术可能是填补这一鸿沟的方式之一。