Dr.Damiano says the system restores, as nearly as possible, the body's delicate metabolic balance.

VOA: standard.2010.04.15

The renal system has an equally important function in that way, in maintaining your water balance.

泌尿系统也同样十分重要,它能够维持体内的水平衡

耶鲁公开课 - 生物医学工程探索课程节选

"That will put in place stronger, global standards across the system that provide the right balance between stability, preserving the capacity for innovation, make sure we reduce the risk of future crises."

VOA: standard.2010.05.26