biogas production rate

例句：

1. 1. The biogas production rate of the farm is very high.
   农场的生物气产量率非常高。
2. 2. The biogas production rate has been increasing steadily over the past few years.
   过去几年里，生物气产量率一直在稳步增长。
3. 3. The biogas production rate is a key factor in assessing the environmental impact of a project.
   生物气产量率是评估项目对环境影响的关键因素。