直升飞机在头顶上轰响着，巨大的浆叶搅动着空气。

Overhead, the chopper roared and the big blades churned the air.

《柯林斯英汉双解大词典》

在机身中心上面安装一个三浆叶主螺旋桨。

The three-blade main rotor is mounted above centre of fuselage.

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直升飞机有一个五浆叶主旋翼和一个四浆叶尾旋翼。

The helicopter has a five-blade main rotor and a four-blade tail rotor.

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