Riders perform the squats in front of a special machine which can tell if the person is in the correct position.
乘客们要在一台特殊的机器上做深蹲，这台机器能识别使用者的姿势是否正确。
How it works: Stand in front of your bookshelf and begin doing squats.
怎么做：站在书架前，开始做深蹲。
If you are passenger, the service worker squats in front of you. how do you feel?
你如果是剩客，服务员蹲在你面前向你服务，你啥感觉。
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