After the earthquake, the government invested heavily in re-building the community's schools and hospitals.

re-building 是由前缀 re-（表示“重新”）和动词 build（建造）组成的复合动词，加上连字符和 -ing 后缀构成现在分词形式。re-build 的字面意思是“重新建造”，即“重建”。