modulusn.[数、物]模量；模数；系数modulus of pressing压缩模量,压制模制数modulus maxima Line模极大值线modulus of drainage排涝模数modulus of shearing剪断模数modulus of discharge流量模数,流量系数modulus of convexity凸性模modulus of toughness韧性模数modulus ofcontinuity连续模modulus of a machine[经] 机械效率modulus of logarithm对数的模

1. Only transformer coupling can contribute to the voltage gain of an amplifier by virtue of a stepup turns ratio.
   只有放大器耦合方能通过开压匝数比提高变压器电压增益。