万一失去平衡，要先卷曲膝盖，松开扣紧的手指，身体向后背的方向滚落，就像小孩子翻跟头那样。

When you do fall, tuck your knees in, release the clasp of your hands, relax, and tumble out of the pose onto your back like a child doing a somersault.

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把你的鞋子扣紧。

Buckle up your shoes.

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当那些人扣紧皮带的时候，警犬在吠叫、哀鸣。

The dogs barked and whined as the men buckled on their leashes.

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