Ellipsis I. In compound sentences V电压的单位是伏符,电流的是安培。 Voltage is measured in volts and current in amperes. V地球级引月球,月球也吸引地球 The earth attracts the moon and the moon the earth vA great many kinds of transistors exist, and many versions of each kindEllipsis Ⅰ . In compound sentences 电压的单位是伏特，电流的是安培。 Voltage is measured in volts and current in amperes. 地球吸引月球，月球也吸引地球 The earth attracts the moon and the moon the earth.  A great many kinds of transistors exist, and many versions of each kind