backward forward counterbackward-forward counterbidirectionalcounterbidirrectional counterforward backward counterforward backword counter双向: two-way计数器: counter; scaler; register; t ...可逆计数器, 双向计数器: reversible counter单向计数器: unidirectional counter定向计数器: directional counters下载手机词典可随时随地查词查翻译
