The building work is now behind schedule, but contractors are confident that they can make up for lost time.这项建筑工程目前落后于预定计划，但是承包人有信心把失去的时间补回来。We got estimates from three different contractors before accepting the lowest....
The light bulb has a resistance of 120 ohms.灯泡有120欧姆的电阻.When resistance in the circuit exceeds 230 ohms, the reading is not completely dependable.网路电阻超过230欧姆时，读数就完全不准了。We shall take the typical emitter - to - base resist...