Using?by using?

The polarity of the output signal can also be changed under software control using the ADCPOLL/ADCPOLR register bit.

為何是using,不是by using?

有時候看到類似用法,卻是by using?
更新: 請問羅莉,

是否using這個字比較常省略by?

因為同篇文章的一段

The ALC/Limiter function is enabled by setting the register bit ALCSEL.

就有用by了.

還是用不用by是隨使用者高興?
1 個解答 1