評論
打印
Metal
金屬
What happens if there is no metal in the world?
如果世界上沒有了金屬會發生什么？
We can't build any buildings.
我們就蓋不了樓房了。
We can't make computers, cars and machines either.
我們也制造不了電腦、汽車和機器。
Hammers, nuts, nails, door locks and keys are also made of metal.
錘子、螺帽、釘子、門鎖和鑰匙也都是用金屬制成的。
We can't use a electricity without metal, because electric wires are made of metal too.
沒有了金屬我們就用不了電，因為電線也是用金屬制成的。
Where do we find metals?
我們在哪找到各種金屬？
Metals are usually found deep in rocks.
通常在巖石深處找到各種金屬。
Some metals like aluminum, iron and titanium are easily found, so they are cheap.
一些金屬如鋁、鐵和鈦很容易找到，所以它們很廉價。
However, some metals like gold are very rare and expensive.
然而，一些金屬如黃金卻非常稀少和昂貴。
