Zhè / bǎ / lí / tóu / yǐ / jīng / yòng / le / hěn / duō / nián / biān / yuán / dōu / mó / dùn / le

这把犁头已经用了很多年，边缘都磨钝了。

This plowshare has been used for many years, and its edge has become worn and dull.