He umpired baseball games.他担任棒球比赛的裁判。He umpired in the tennis match.他在网球比赛中担任裁判.I’ve umpired a cricket match for them.我当过他们的板球比赛的裁判。He umpired for school football matches until he was in his late 50s.他担任校际足球比赛的裁判一直到年近花甲。...
将试瓶浸入恒温水浴中.The sample flask is immersed in a constant temperature bath.这是许多恒温箱的基本工作原理.This is the basic operating principle of many thermostats.恒温器可用来调节室内温度.Thermostats can be used to regulate the temperature of a room....
Old buses are major contributors to pollution in British cities...破旧的公交车是造成英国城市污染的主要因素。Resonance theory says that benzene can be represented by two contributors.共振论认为苯能用两个参与体表示.Large public and private companies have lon...
他们为了探寻铀矿走遍了全国.They went over nationwide in search of uranium mines.“辛托6”的铀矿体产于不整合面之下变质甚深的粒玄岩中.At Scinto 6 uranium occurs in much altered dolerite below the unconformity.沥清铀矿和铜铀云母比纯铀的放射性强得多.Pitchblende and chalcolite are ...