该前缀是字母与数字的长组合，每个特定规则执行的前缀是唯一的。

The prefix is a long combination of letters and digits that is unique for the specific rule execution.

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编制C++ 程序，计算出若干组杆长组合，从中筛选出一组最优解。

We programmed in C++, calculated, and selected the best solution from a set of solutions we got.

youdao

两个长直道提供相当好的超车机会，弯角的组合相当棒，尤其是高速段。

It has a good combination of corners and that really long straight at the end of the lap which is perfect for overtaking.

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