以预备级和剑桥一级为主的翻译：Mainly to preparatory level and Cambridge level 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

To prepare for a Cambridge-based level and

Mainly to preparatory level and Cambridge level

Prepares the level and the Cambridge level primarily

In a preparatory class and Cambridge a level-based

Mainly to preparatory level and Cambridge level