一名守卫用警棍敲打金属扶手。A guard raps his stick on a metal hand rail.暴乱中，警察挥舞着警棍对人群发起冲击。Police in riot gear baton-charged the crowd.他们被警察用警棍赶了回去.They were driven back by a police baton charge....
他在一小时内接了十二只电话.He had twelve phone calls in the space of an hour.我会在电话铃响四声内接起电话.I answer the telephone within four rings.实验壳体采用单曲率椭球内接多面壳体.A single curvature shell of an inscribed ellipsoid was used as the experimental sh...