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。
Riderss 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。
Riderss 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。
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