千锤百炼--------A good nail does not fear the hammer

例句：
A: His calligraphy is second to none in the world.
他的书法在世界上没有对手。
B: I agree with you there and a good nail does not fear the hammer.
我同意你的说法，而他的书法也的确是经过千锤百炼。

同义词：
steeled and tempered； gone through fire and water