与美国小学生一起学英文第7册 第7期:电池
时间：2019-01-10 作者：英语课 分类：与美国小学生一起学英文第7册
英语课
A battery is a box of electricity. 电池是一盒电。
It stores chemical energy and this chemical energy changes into electricity. 它能储存可以转化为电能的化学能。
Can you name the things that need batteries 2? 你能列举出需要电池的物品吗？
A clock may need a battery. 钟表可能会用到电池。
A car needs a battery to start its engine. 汽车需要电池来发动引擎。
Many things around us are useless without batteries. 我们身边的很多东西没有电池就一无是处。
Do you know that batteries were very huge a long time ago? 你知道很久以前电池的体积很大吗？
People couldn't carry batteries because they were too heavy. 人们携带不了电池，因为它们太笨重了。
So, scientists developed small batteries. 因此，科学家研制出了小型电池。
Now, we can carry them everywhere. 如今，我们去哪里都能带上它们。
n.电池；一批；金属物件；群；【律】殴打
- He is charging a storage battery.他在为蓄电池充电。
- The battery has run down.电池用完了。
标签：
小学英语