zhè / tiáo / jiē / yǐ / qián / zāng / luàn / chà / xiàn / zài / yǐ / jīng / zhěng / zhì / de / hěn / gān / jìng / le

这条街以前脏乱差，现在已经整治得很干净了。

This street used to be filthy and disorderly, but it has now been cleaned up.