The total volume of water in the saturated sample must therefore be thought of as consisting of water that can, and water that cannot drain away.
"因此，人们认为充满水分的岩石样本的总含水量既包括可能会渐渐流失的水分，也包括不会流失的水分。
2
It's also worth pointing out that the study involved a relatively small sample of girls: 83 in total, which doesn't seem like a large enough group to form any definitive, universal conclusions.
This article discussed how to modify our Calculator service sample to establish it as a subscription service for notification of any changes in its state (the value of total).