设计师改进了飞机的机翼，使其外形更流线型并减少空气阻力。

The designers improved the plane's wings to ___streamline its shape and reduce air resistance.

我们简化了申请流程，让它更高效。

We ___streamlined the application process to make it more efficient.

这艘船的流线型外形有助于减少水的阻力。

The ___streamlined shape of the ship helps reduce water resistance.