Whistler, as always, was merciless.和以往一样，惠斯勒还是那么冷酷无情。Look at this. A ski trip to Whistler. Whistler is a famous ski resort.看这张海报, 去惠斯勒滑雪旅游,惠斯勒可是个有名的滑雪胜地.Whistler is very safe and easy to get around in.惠斯勒是个非常安全的地方,可以轻松地四...
电流滞后于电压.The current lags behind the voltage.如果输入的电压是+3伏, 那么输出的电压便是-6伏.If the input voltage is plus three , it comes out as minus six.我们用以表示电压和电流的单位分别为伏特和安培。The units in which we show voltage and current are volt and ampe...