Professor Griffiths explained how the drug appears to work.格里菲思教授解释了那种药物的工作原理。The Professor was beginning to get on Molly's wick.教授快要把莫莉惹毛了。"Professor Theron," he began, "I'm very pleased to see you"“西伦教授，”他开口说...
一扭开煤气管,你就应该点燃煤气.You should light the gas as soon as it is turned on.我们这个地区将要铺设煤气管.Our neighborhood will be piped for gas.当他们在修理煤气管时,煤气供应将暂停.The gas supply will be off while they repair the mains....