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。
His wife was astonished at the astronomical sum of money he had spent.
他的妻子被他花的天文数字的钱款惊呆了。
He was too poor to buy an astronomical telescope.
他太穷了，买不起天文望远镜。
