zhè / ge / bēi / bāo / de / kòu / huán / huài / le / zǒu / lù / shí / zǒng / shì / zì / jǐ / dǎ / kāi

这个背包的扣环坏了，走路时总是自己打开。

The buckle on this backpack is broken and keeps opening by itself while I walk.