When the galvanometer reads zero the circuit is in the null - balance position.当检流计的读数为零时,电路处于零平衡位置.If a sinusoidal current is sent through a movingcoil galvanometer, the meter reads zero.如果将一正弦电流通入动圈式电流计, 那么这电流计的读数为零.Th...
物理学研究力学、热学 、 光学 、 声学和电学.Physics studies mechanics , heat, light, sound and electricity.这两个学生都做了不少电学实验.Both students have made quite a few experiments on electricity.从量子电动力学可以得出所有已知的电学 、 力学和化学定律.Out of quantum electrodyna...
Everything impermanent as change is the only constant in nature.凡事变幻无常,唯一不变的自然定律就是“变”!We are reminded just how small and how impermanent we are.它让我们意识到我们有多么渺小,我们的生命是何其短暂。The world is in continuous flux and is impermanent...