我需要确切的数字，而不是估计。
要是我们有一个确切的数字反映这个国家到底有多少人没有工作就好了。
It would be very nice if we had a true figure of how many people in this country haven't got a job.
没有人知道确切的数字，但是根据政府的调查，粗略计算之后显示，大约有1600所美国公立和私立学校在教授中文，而十年前只有300所左右。
No one keeps an exact count, but rough calculations based on the government's survey suggest that perhaps 1,600 American public and private schools are teaching Chinese, up from 300 or so a decade ago.
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