actual base excess

例句：

1. 1. The engine'sactual base excess is measured in parts permillion (ppm).
   发动机的实际基余量是以百万分之一为单位测量的。
2. 2.The chemical engineer calculated the actual base excessof the solution.
   化学工程师计算了溶液的实际基余量。
3. 3. The manufacturer reported thatthe actual base excess of the product waswithin acceptable limits.
   制造商报告称，该产品的实际基余量在可接受范围内。