The prototype was made completely of carbon fiber to save weight.

为了让这款车具有尽可能多的载重本领，车身采纳了全碳化纤维制作。

youdao

Peter has chosen to fit lightweight sandwich bulkheads to save weight.

彼得选择适合轻量级夹心舱壁以节省重量。

youdao

The Yak-3 airframe was created as light as possible to save weight and gain more speed and manoeuvrability.

为了增加速度和机动性，雅克3的机身被设计得尽可能轻巧。

youdao

It also increases the use of costly carbon-fiber body panels (the hood and roof) and other composite materials, to save weight.

WSJ: 2014 Chevrolet Corvette Stingray: Drive All-American | Rumble Seat by Dan Neil

This is what happens to the supplements that were pulled out, to save weight, by that newsagents on virtuous Mersea Island.

BBC

Built of plastic to save weight, it was more akin to a scooter than to a bicycle, and it ran on a pair of lead-acid batteries, similar to those under the hood of a car.

NEWYORKER: Green Giant