maximum allowable concentration for toxicant

例句：

1. 1.The maximum temperature reached during the day was 30°C.
   当天的最高温度达到了30°C。
2. 2. The maximum capacity of the storage tank is 500 liters.
   储罐的最大容量是500升。
3. 3.The maximum speed limit is 60 km/h on this stretch of road.
   这条道路的限速为每小时60公里。