hard rigid solid stiff firm steel diamantine rock solid
Choose a soft, medium or firm mattress to suit their individual needs.
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。
—— 柯林斯例句The fossils at Dinosaur Cove are embedded in hard sandstones.
恐龙峡谷中的化石都嵌在坚硬的砂岩中。
—— 柯林斯例句The substance polymerizes to form a hard plastic.
这种物质聚合形成坚硬的塑料。
—— 给力词典精选To build this tunnel we had to cut through the solid rock.
为了修建这条隧道,我们必须凿开坚硬的岩石。
—— 给力词典精选He breaks up strong ground with a pick.
他用镐刨开坚硬的地面。
—— 给力词典精选