Back-and-forthmethod is an important tool for studying model theory and its application.
向前向后方法是模型论及其应用研究中的一个很重要的工具。
2
Also, I enjoyed the teaching method I had experienced her, it was progressive, so testing wasn't as important as the free flow of ideas backandforth between teacher and student.
并且，我非常喜欢这里先进的教学方法，师生之间自由的思想交流比考试重要得多。
3
The IBM software engineers working on Lotus collaborative software have devised an ingenious method for replicating data on the fly backandforth between a Domino database and an Outlook PST file.