bù duì / zài / hé duì àn / jiàn lì / qiáo tóu bǎo / wèi / hòu xù xíng dòng / tí gōng / le / jī dì部队在河对岸建立桥头堡,为后续行动提供了基地。The troops established a bridgehead on the opposite bank, providing a base for subsequent operations.