nà / ge / jiù / shì / chǎng / lóng / shé / hùn / zá / yóu / kè / zuì / hǎo / bú / yào / dān / dú / xíng / dòng

那个旧市场龙蛇混杂，游客最好不要单独行动。

That old market is full of all kinds of people, so tourists should avoid going alone.