granite

这座古老的纪念碑是用坚固的花岗岩雕刻而成的。

The ancient monument was carved from solid ___granite.

尽管面临重重困难，他的决心依然坚如磐石。

Despite all the challenges, his determination remained as solid as ___granite.

她的决心像花岗岩一样坚定，不会被任何困难动摇。

Her determination was as hard as ___granite, unshaken by any challenge.