后援 hòuyuán backup Origin Definitions Defs Strokes Stroke Words Sentences Sents Showing: reinforcement All meanings 2 hòuyuán 2 backup 1reinforcement 1 1 sentence for 后援 (hòuyuán — reinforcement) 前线部队急需后援。 qiánxiàn bùduì jí xū hòuyuán. Frontline troops are in urgent need of reinforcements. Source: Dong Chinese Dictionary