percent volume increase

Under worst case scenarios, an average 20 percent increase in the volume of overflows is possible, and those overflows will last longer.

在最糟糕的情况下，溢流量可能平均增加20%，且溢流持续时间更长。

During three weeks of usability testing in October, Project Masiluleke helped increase average daily-call volume to the National AIDS Helpline in Johannesburg by nearly 200 percent, said Pop!

10月份三周来的可用性测试中，Masiluleke计划促使约翰内斯堡国家艾滋病帮助热线每日电话总量增加了接近200%，Pop ！

The volume of total exports and imports will increase by around 10 percent.

进出口总额增长10%左右，国际收支状况继续改善。