4周搞定2000+托福核心词
fro
常考释义
What those early craftsmen had found by trial and error was that under pressure a pagoda's loose stack of floors could be made to slither to and fro independent of one another.
那些早期的工匠历经反复的尝试和失误，最终发现，在压力之下，没有被固定死的楼层之间能够独立进行来回的滑动。
来源于：剑雅7-Test2adv. 回；过来；参见：to
As Katrina went to and fro with the coffee pot, her gaze remained glued to his face.
卡特里娜端着咖啡壶来来回回走动着，但视线一直盯在他的脸上。
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