基层

例句：

1. 1. 在城市规划中，基层建设是至关重要的一环。
   In urban planning, the construction of the grassroots is crucial.
2. 2. 为了提高产品质量，我们需要从基层做起。
   To improve product quality, we need to start from the grassroots.
3. 3. 基层员工是公司运营的基础力量。
   The grassroots staff are the foundational force in the company's operation.