And even when the batteries start to lose capacity, he suggests, they will have a usable afterlife as, for instance, buffers to store electricity produced by wind farms.
即使电池开始失去负荷，它们还可以做其它用途，如，作为储存风力发电场产生的电力的缓冲器。
2
Such enormous stores will not necessarily be filled to capacity with usable information.
如此庞大的存储并不一定会装满有用的信息。
3
In power market environment, available transfer capability (ATC) is an important indicator of the further usable amount of transmission capacity for commercial trading.