tā / men / gāng / zǒu / jìn / shù / lín / jiù / zhōng / fú / le / wán / quán / méi / yǒu / fáng / bèi

他们刚走进树林，就中伏了，完全没有防备。

As soon as they entered the woods, they were ambushed and were completely unprepared.