vol是什么意思

　　Can you turn the volume up a bit?

　　你能把音量开大点儿吗？

　　This work has grown in volume recently.

　　这项工作的量最近增加了。

　　New roads are being built to cope with the increased volume of traffic.

　　正在修建新的`道路以应付增加了的交通量。

　　The number of accidents is proportionate to the increased volume of traffic.

　　交通事故的数字与交通量的增长成正比。