电动机: electric motor; motor (俗称“马达; 电滚子”)◇电动机并联法 parallel connection of the motors; 电动机效率 motor efficiency; 电动机增益 motor gain; 电动机转子 motor rotor
垂直: perpendicular; vertical; squareness; verticality; perpendicularity 短语和例子两线垂直相交。the two lines meet at right angles. 设 ab 垂直于 cd。let ab be perpendicular to cd. 当表面与射线垂直时，射线的强度最大。when a surfa
