no effect level

例句：

1. 1. Thedrug has no effect on the patient's health.
   这种药物对病人的健康没有影响。
2. 2. The experiment showed that the temperature hadno effect on the growth of the plants.
   实验表明，温度对植物的生长没有影响。
3. 3. The study found that the concentration ofthe pollutant had no effect onthe environment.
   研究发现，污染物的浓度对环境没有影响。