The authors mentioned that the photocatalytic activity depends also on the amount of photocatalyst. This is not true! If it depends on the amount of photocatalyst, the efficiency can reach more than unity.
作者提到,光催化活性依赖于光催化活剂的量。这不对,如果依赖光催化剂的量, the efficiency can reach more than unity 最后一句话没懂