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For almost a century, until the 1960s, soda bottles in the US were generally meant to be returned.

走进山西电力交易大厅，记者看到屏幕上实时显示火电出力量、风光发电量等数据。

。旺商聊官方下载对此有专业解读

类似整理扑克牌：每次拿一张新牌，插入到已排好序的牌堆中合适位置

圖像來源，BBC CHINESE/ TING CHIANG