The Health Secretary told Parliament that the reforms would be phased in over three years. [be VERB-ed PREP.]

卫生大臣对议会说，改革将在3年内逐步展开。

The change is part of the government's policy of phasing in Arabic as the official academic language. [VERB PREP. noun]

这一变革是政府将逐步采用阿拉伯语作为官方学术语言政策的一部分。