1、This to-and-fro approach is called a "rocking chair" design.
這種往回式方法稱為“搖椅(rocking chair)”式設(shè)計。

2、The teacher walked to-and-fro in front of the class as he spoke.
老師一邊說話一邊在教室前面來來回回的走動。

3、the to-and-fro of a pendulum
鐘擺的往復擺動

to-and-fro翻譯