評論
打印
Circuit
電路
Do you have any idea what a circuit is?
你了解電路嗎？
It is a road where electricity flows.
它就是電流經(jīng)過的路。
How can you light a bulb using a battery?
怎么用電池點亮燈泡？
You have to connect a battery and a light bulb with two wires.
你得用兩根電線連接電池和燈泡。
You need one wire to connect one end of the battery and a bulb first.
你要先用一根電線連接電池和燈泡的一端。
And you connect the other end of the battery and a bulb with another wire.
再用另一根電線連接電池和燈泡的另一端。
Then the bulb will be lit.
這樣這個燈泡就會被點亮。
It is because electricity in the battery flows through the light bulb.
那是因為電池里的電流到了電燈泡里。
Where do we use circuits? Everywhere!
我們在哪里會用到電路？無處不用！
Because of circuits, we can make electricity flow inside machines.
因為有了電路，所以可以讓電流到機器里面。
