wǒ jūn / lì yòng / dì xíng / yōu shì / jiāng / dí jūn / zhǔ lì / jù jiān / yú / shān gǔ / zhī zhōng

我军利用地形优势，将敌军主力聚歼于山谷之中。

Our troops took advantage of the terrain to round up and annihilate the main enemy force in the valley.