hard rigidity solid stiffness be strong and tough
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During the dry season the land is rock hard.
土地在旱季会非常坚硬。
—— 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The outer surface of ship´s hull is very hard.
船体的外表面非常坚硬。
—— 给力词典精选