标枪现在由铝和其他的轻型材料制成；撑杆由玻璃纤维合金制成；“阶段变化”材料也正被开发出来用于制作运动服。

The javelin is made of aluminum and other light weight materials. Poles are built with fiberglass alloys. "Phase Change" materials are now being developed for sportswear.

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标枪现在由铝和其他的轻型材料制成；撑杆由玻璃纤维合金制成；“阶段变化”材料也正被开发出来用于制作运动服。

The javelin is made of aluminum and other light weight materials. Poles are built with fiberglass alloys. "Phase Change" materials are now being developed for sportswear.

youdao