During the pre-deployment phase, we need to conduct final tests on all features.

pre-deployment 是由前缀 pre-（表示"在...之前"）和名词 deployment（部署）组成的复合词。deployment 来自动词 deploy（部署），加上名词后缀 -ment 构成。 pre-deployment 指"部署前的阶段"，即"预部署阶段"。