control of source

例句：

1. 1. The company implemented a new system to better control the source of its raw materials.
   该公司实施了一个新的系统，以更好地控制其原材料的源头。
2. 2.The research team focused on developing effective methods for controlling the source of water pollution.
   研究团队专注于开发有效方法，以控制水污染的源头。
3. 3. In order to reduce greenhouse gas emissions, it is essential to control the source of energy consumption.
   为了减少温室气体排放，控制能源消耗的源头至关重要。