摆动

shù zài fēng zhōng bǎi dòng

树在风中摆动。

Trees swayed in the wind.

qián hòu bǎi dòng

前后摆动

swing back and forth

àn shùn shí zhēn fāng xiàng qīng qīng bǎi dòng yòu bì

按顺时针方向轻轻摆动右臂。

Gently swing your right arm in a clockwise direction.

biān zǒu biān bǎi dòng shuāng bì

边走边摆动双臂。

Let your arms swing as you walk.