Lovell signed up to a programme that sent him to college at the military's expense while training as a fighter pilot.
the preposition mid，详情可参考WPS官方版本下载
Before diving into API design, it's worth asking: what is a stream?，这一点在雷电模拟器官方版本下载中也有详细论述
candidate.weight = 1.0 / distance to candidate，详情可参考体育直播