Those were indeed the olden days so the only activeelement was a galena crystal grazed by a wire whisker.
Those were indeed the olden days so the only activeelement was a galena crystal grazed by a wire whisker.
那确实发生在过去的岁月，所以，我唯一的“行动”是利用金属须晶轻轻擦过硫化铅晶体。