“坚硬的”造句

针对他们各人不同的需要挑选柔软、软硬适中或者坚硬的床垫。
Choose a soft, medium or firm mattress to suit their individual needs.

恐龙峡谷中的化石都嵌在坚硬的砂岩中。
The fossils at Dinosaur Cove are embedded in hard sandstones.

这种物质聚合形成坚硬的塑料。
The substance polymerizes to form a hard plastic.

• #坚硬的