In this case, quadra means "four".

在这种情况下，quadra 的意思是“四”。

The all-new Jeep Grand Cherokee offers the new Quadra-Lift air suspension system.

全新吉普大切诺基提供了新的空气悬挂系统。

The large transparent umbrella mounted on a light stand with a Quadra head, acted as the main light.

大的透光伞是装在Elinchrom Quadra的一个灯头上作为主光。

Quadra Drive II, with a rear Electronic Limited-Slip Differential (ELSD), delivers industry-leading tractive capability.

利用后电子限滑差速器（ELSD）可以提供业界领先的牵引能力。