variable resistance短语¹¹⁴⁴⁶⁷⁺⁴ 基本例句 adj.可变电阻的 In those days the only reliable vacuum tube was the Western Electric repeater triode, and if one needed a variable resistance he wound a lot of wire on a wooden spool. 在那个时候唯一可靠的真空管就是 Western Electric中继器三极管，而如果需要变阻器时，就用金属丝缠在木卷轴上自己做一个。 bbs.translators.com.cn