大脑需要持续供氧。The brain requires a constant supply of oxygen.氧气泡a bubble of oxygen医院中抗甲氧西林金黄色葡萄球菌感染病例不断增长的发生率rising rates of MRSA infections in hospitals...
The revolver was a dummy.这把左轮手枪是假的。He had only seven rounds of ammunition for the revolver.他这把左轮手枪只有7梭子子弹。The two men advanced on each other with drawn revolver.这两个人都拔出了手枪, 一步步相互逼近。City police said the man was armed with...