Between the trees a long board is hanging--it is a swing.

树间挂着一块长木板——那是一个秋千。

youdao

Swinging leg should actively swing forward after taking off the board to lower horizontal speed loss and improve the jumping speed.

摆动腿蹬离地面后积极前摆对加快起跳腿的下压着板、减少水平速度损失、获得较大的腾起初速度有利。

youdao

Young female long jump two levels of athletes instantaneous and take off in the process in the board to swing the leg knee Angle oversized folds not tightly.

少年女子跳远二级运动员在着板瞬间和起跳过程中摆动腿膝角过大，折叠不紧。

youdao

Let me swing this board around.

让我把黑板翻个面

耶鲁公开课 - 聆听音乐课程节选

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