锲而舍之,朽木不折；锲而不舍,金石可镂.两种译文版本：
Carving something but giving up halfway,we cannot even carve rotten wood.But if we carve with perseverance,metals and stones are able to be shaped well.
If you start carving and give up,you won’t even be able to break rotten wood,but if you start carving
and don’t give up,then you can engrave even metal and stone.