与美国小学生一起学英文第1册 第10期:电灯泡(在线收听) |
Light Bulb 电灯泡 Before the light bulb was invented, there was only a candle to light up a room. 在电灯泡未发明之前,只有蜡烛能照亮屋子。
Finally, in 1879 Thomas Edison invented the light bulb. 最终,1879年,爱迪生发明了电灯泡。
The first light bulb lasted only 13 hours. 第一盏电灯泡的寿命只持续了13个小时。
But later Edison developed a new light bulb which lasted up to 1,200 hours in 1880. 但后来,爱迪生在1880年研发了一种寿命能持续1200多个小时的新型电灯泡。 |
原文地址:http://www.tingroom.com/lesson/ymgxxsyqxyy/d1c/428690.html |