yóu / yú / qiáo / bèi / chōng / huǐ / tā / men / zhǐ / néng / shè / dù / zhè / tiáo / xiǎo / hé

由于桥被冲毁，他们只能涉渡这条小河。

Because the bridge had been washed away, they could only wade across the small river.