Unwavering and resolute; firm and unyielding; tough as steel and iron.
他以钢浇铁铸般的意志，克服了生活中的重重挑战，最终取得了令人瞩目的成就。
With an unyielding will as if cast from steel and iron, he overcame numerous challenges in life and ultimately achieved remarkable accomplishments.
Next Idiom