天文数字的英文：
an enormous (or astronomical) figure

astronomical adj.
天文学的；天文数字的；庞大的

The cost will be astronomical.
费用将是一笔天文数字。

The annual drug bill of the Health Services is mounting to astronomical figures
卫生部门的年度药费快达到天文数字了。

For me such a large sum of money is an astronomical figure.
这么多的钱对我来说,简直是个天文数字。

The price of this gem is expensive -- as much so as astronomical figures.
这个宝石的价格十分昂贵－－简直是个天文数字。

In this period, the cost would be enormous.
在这期间，就会损失惨重。

He paid an enormous sum.
他支付了一大笔款项。

The right words help enormously.
正确地用词起着巨大的作用。

astronomical adj.
天文学的；天文数字的；庞大的

The cost will be astronomical.
费用将是一笔天文数字。

Astronomers can predict an eclipse.
天文学家们能够预测日蚀。

figure of eight
ph.1. 【英】(打结、溜冰、舞步等的)八字形

juggle with figures
窜改数字

This is a painting of figure.
这是一幅人体画。