如果将这些教科书使用寿命延长一年的话就可以节省许的翻译：To extend the service life of these textbooks about a year, then you can save 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

If you extend the life of these textbooks a year, then you can save a

To extend the service life of these textbooks about a year, then you can save

If lengthens these textbook service life year to be possible to save little

If you use these textbooks life extended for one year, then you can save your

To extend the service life of these textbooks about a year, then you can save