The reactions of fish to AC can be distinguished into four stages: electrifying, electrotaxis, electronarcosis and electrocuting.鱼对交流电的反应可分成四个阶段: 感电 、 定向 、 麻醉和击昏反应....
They classed this insect under the Coleoptera.他们把这种虫列入甲虫类.North Carolina is classed as an agricultural state.北卡罗来纳州是农业州.Opium is classed under the head of narcotic.鸦片是归入麻醉剂一类的东西....
售票处正在售票.Tickets are on sale from the booking office.售票窗口那个女的告诉我入场费是17.50美元。The woman at the ticket window told me that the admission fee was $17.50.你应该从售票机上买票.You should buy the ticket from the ticket machine....