基本解释adj.超硬的同根派生 英汉例句They mentioned that they worked extrahard on this album. 他们提到说，他们在这张唱片上花了格外多的工夫。You can become extraordinary out of your ordinary life through extrahard work. 要肯定自己的能力。要增加自己的能力。有料走遍天下都不怕。extrahard steel 极硬钢