“先头”的反义词有哪些

“先头”的英语可以翻译为：ahead，in front，before，formerly，in advance ...

“先头”的拼音为：xiān tóu...

我们是先头部队, 大军随后就到.We are the advance detachment. The main forces will be here soon.我们派出一支先头部队.We sent out an advance party of soldiers.美军是这次进攻的先头部队.American troops formed the spearhead of the attack....