to-and-fro造句

1、This to-and-fro approach is called a "rocking chair" design.
这种往回式方法称为“摇椅(rocking chair)”式设计。

2、The teacher walked to-and-fro in front of the class as he spoke.
老师一边说话一边在教室前面来来回回的走动。

3、the to-and-fro of a pendulum
钟摆的往复摆动

to-and-fro翻译