Zhè / cì / zhànshù / yǎnliàn / yāoqiú / bùduì / bìxū / xuéhuì / chāo / hòu / lù / tūpò / dífāng / fángxiàn / 。

这次战术演练要求部队必须学会抄后路突破敌方防线。

This tactical drill requires the troops to learn how to outflank the enemy from the rear and break through their defensive line.