现代冲浪板通常用玻璃纤维制成，既轻便又结实。

Modern surfboards are usually made of ___fibreglass, which is both lightweight and strong.

这艘船的船体是用玻璃钢制成的，既轻便又耐用。

The boat's hull is made of ___fibreglass, making it both light and durable.