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。WPS官方版本下载对此有专业解读
My Voyager keyboard and Ploopy Adept trackball are mounted to a telescoping section of T-slot that allows me to stand about 1.5 meters / 5 feet away from the monitors. This reduces eyestrain from working at a computer all day and, hopefully, helps slow the progression of myopia. I used ZSA’s Tripod Mount kit and standard ball-head tripod mounts to connect the keyboard and mouse to the T-slot. This makes for easy, secure tenting of the keyboard and mouse at the perfect angle.，这一点在服务器推荐中也有详细论述
k--; // 剩余删除名额减1（关键：控制删除位数，保证保留足够长度）