mestranol

例句：

1. 1.The pesticide mestranol is effective against many types of weeds.
   甲磺隆这种农药对许多杂草都很有效。
2. 2. The farmers used to use mestranol for controlling the weeds in their fields.
   农民过去常用甲磺隆来控制他们田地里的杂草。
3. 3.Mestranol is a common chemical used in agriculture to kill weeds.
   甲磺隆是一种常见的化学药品，用于农业中杀死杂草。