短语讲解：

1. The body of a cello, for example, is made from an old oil can.

be made from 由…所做成的（用于原材料不易看出的场合）
例句：My father said cement couldn't be made from chalk. 
我父亲说水泥不能用白垩来制作。 

2. The performers come from a poor neighborhood in Cateura, Paraguay.

come from 来自
例句：Ambient noise may come from any direction. 
外界噪声可以来自任意方向。  
 
3. After the teaser came out, a lot of people came through and donated from all over the world…donated instruments for them.

come out 出来; 出现
例句：These new products will come out before long. 
这些新产品不久将要上市销售。