reinforcement

详细解释:n. 加强, 增援, 补充, 援军, 加固物
【化】 补强; 加强件
【医】 增强, 增力

英语解释：

名词 reinforcement:

a military operation (often involving new supplies of men and materiel) to strengthen a military force or aid in the performance of its mission同义词：support, reenforcement