普通的電流計(jì)無法響應(yīng)這些快速的交替變化.An ordinary meter will not respond to these rapid alterations.他十分經(jīng)心在意地望著電流計(jì).He was very attentive to the ammeter.如果將一正弦電流通入動(dòng)圈式電流計(jì), 那么這電流計(jì)的讀數(shù)為零.If a sinusoidal current is sent through a movingcoil galv...