1、坚定的
坚定的 adamantine; consistent; constant; determined; firm; flintlike; immovable; impr ...他是个聪明而又意志坚定的人 he was a man of intelligence and of firmness of will.
2、燧石样的
... flintify 使变成燧石 flintlike 燧石样的, 坚硬的 Flintshire 弗林特郡，燧石辖邑 ...
3、坚硬的
坚硬的 adamantine; brazen; calculous; callous; firmer; flintlike; flinty; granitic; h ...半坚硬的 semi hard; semi-hard ..