dí / jūn / yǐ / jīng / qiē / duàn / le / tuì / lù / chéng / lǐ / de / shì / bīng / chéng / le / wèng / zhōng / zhī / biē

敌军已经切断了退路，城里的士兵成了瓮中之鳖。

The enemy had cut off the retreat, leaving the soldiers in the city trapped.