政府计划在下周正式推出全民健康应用程序。

The government will start the official ___roll-out of the national health app next week.

新软件的逐步推出将先从测试部门开始。

The ___roll-out of the new software will start with the testing department first.

我们在地板上铺开新地图时，卷起的部分需要小心展开。

During the ___roll-out of the new map on the floor, we had to carefully unfold the rolled-up sections.