ㄅㄞˇㄉㄨㄥˋbǎidòng

摆动
  1. 來回搖擺移動 稻穗擺動」、擺動尾鰭」。

to sway, to swing, to move back and forth, to oscillate
osciller, se balancer
pendeln, federn (Phys)​