640的英文是：six hundred and forty；

hundred：num.一百;许多;大量;100到999间的数目;百位数。

forty：n.四十;四十几。

相关介绍

After forty years in the police force nothing much shocks me

在警队呆了40年后，我对什么都见怪不怪了。

I was forty, the age when people take stock and change their lives.

我已年届不惑，到了该全面审视自己并改变生活的年龄了。

Two-way trade between the two countries increased by more than forty per cent last year

去年，两国间的双向贸易增长了40%多。

Now I can look back on the whole tragedy from a distance of forty years.

时隔40年后，现在我可以回顾整个悲剧了。

Forty per cent of the population is suffering from malnutrition

人口中有40%的人营养不良。