可用流量的英文：
usable flow
adj. 可用的
usable or operative or practiced in all kinds of weather.
在任何天气下都可使用、都有效或都可运行。
The act of obtaining usable substances from unusable sources.
废物利用从无用的东西中获取有用物质的行为
To procure(usable substances)from refuse or waste products.
回收利用从废物或废品中获取(可用之物质)
New techniques make it possible to recover usable things from waste.
藉新技术即能从废弃物中回收可用之物。
Shelf-life(time for which a stored item remains usable )
贮藏寿命(物品的保存期限)
v. 流动；源自，来自
n. 流；流动；流畅；连贯；大量
Exercise stimulates the flow of blood.
锻炼促进血液循环。
free flowing contour
自然起伏的地形
The flow of fluid is steady.
液体的流动很稳定。
A flow of words is no proof of wisdom
口若悬河不能作为才智的证明。
Flowing with milk and honey
鱼米之乡