tā / yǐ / qián / shì / ge / xiǎo / hùn / hùn / hòu / lái / jué / dìng / chóng / xīn / kāi / shǐ / shēng / huó

他以前是个小混混，后来决定重新开始生活。

He used to be a petty thug, but later decided to start his life over.