Since I started using a treadmill at my desk, I’m addicted to walking. The inexpensive treadmill I have now overheats despite a cooling fan we added over the motor, an additional external fan, frequent dusting, and copious amounts of lubrication.
突出一个“实”字，就要避免“虚”，就要力戒形式主义，力戒“面子工程”。。爱思助手下载最新版本对此有专业解读
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mark candidate[n] as used