统计学原理数据预测简介：The most strange thing is that his back is pressed tightly against the wall. Even when he is browsing the products, he walks close to the product shelves on the other side, as if he is afraid that others will see his back.
The most strange thing is that his back is pressed tightly against the wall. Even when he is browsing the products, he walks close to the product shelves on the other side, as if he is afraid that others will see his back.
