复数： expansions

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A reading above 50 indicates expansion .

指数超过50即表示扩张。

Work on volcan 's expansion plan has slowed .

volcan公司因此减缓了其扩展计划。

We have got used to expansion and dominance .

我们必须习惯资源的膨胀和支配。

That leaves a fair amount of room for expansion .

这为扩大范围留下了相当数量的空间。

But by itself expansion will not have done much .

但是依靠它自己的发展并不能做太多。