He's ready to start his forward swing.

他准备向前迈步击球。

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As your left leg slides back your right arm should swing forward.

当你的左脚向后滑时，你的右手臂就得向前摆。

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Meanwhile, swing right arm forward.

同时，右臂前摆。

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Move whiffle bat as hands begin to move forward for the swing.

当手开始往前移动准备挥击的时候，手中的球棒要同时移动。

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Move whiffle bat as hands begin to move forward for the swing.

当手开始往前移动准备挥击的时候，手中的球棒要同时移动。

youdao