[文法] to和of的不同??
The duty cycle is the ratio of the on-time to the period;
the modulating frequency is the inverse of the period.
這段是講述PWM(pulse width module)的運作部分..
duty cycle是指在一個周期中..電路為on的比例..
=======================================以上是基本概念介紹
問題來了=================================================
第一句中..the ratio "of" the on-time "to" the period
第二句中..the inverse "of" the period
老實說已經有點搞不清楚啥時該用to..啥時該用of
就像很生活化的例子..
the key to the door...
the ticket to the concert..
有誰能幫我釐清一下阿...
小弟先謝過了..<(_ _)>
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