Since you often won't get numbers which exactly match the desired ratio, you could do a continuedfraction expansion of their quotient.
因为你往往不会得到数完全正确比赛所需的比例，你可以做一个连分数他们的商展开。
2
Truncating that continuedfraction can give you a best rational approximation.
截断，连分数可以给你一个最佳有理逼近。
3
A new continuedfraction form of the mapping function deduced from the generator function method is applied into both the atmospheric delay and the astronomical refraction.