This material outwears all others.

这种材料比其它所有材料都耐用.

For the sword outwears its sheath, And the soul outwears the breast, And the heart must pause to breathe, And love itself have rest.

因为利剑能够磨破剑鞘，灵魂也把胸膛磨得够受，这颗心呵，它得停下来呼吸，爱情也得有歇息的时候。