极硬的英文

• as hard as a brick

• 极:    I the utmost point; extreme
• 硬:    hard; stiff; tough
• 极硬钢:    dead hard steel; dead-hard steel; extra hard steel; extrahard steel
• 极硬水:    very hard water
• 极硬雪:    marble crust

例句与用法

1. The force of water expanding is so great that it will break the hardest metal
   水膨涨的力很大，可使极硬的金属破裂。