慢速英语:American Scientists Work on Printing of Living Tissue Replacements

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短语讲解：

1. Three-D printers are used to make everything from automobile parts to bone replacements for human patients.

be used to 习惯于，适用于
例句：Petroleum can be used to produce various chemical products. 
石油可用于生产多种化学产品。 

2. "And with our 3-D bio-printer, we have been able to create new microvascular networks that we can then grow new tissues in very key areas such as pancreas, liver and kidney."

be able to 能够
例句：We must be able to stay impartial at all times. 
我们必须经常保持公正的态度。 

3. But they hope in a few years they may be able to print tissue to replace damaged human organs.

a few 少许， 少数; 一点点
例句：There are only a few manual affordances. 
手动启示数量很少。 

4. Michael Yost hopes that more people will believe in the benefits of biofabrication.

believe in 信赖;信仰
例句：I believe in the strength of community.
我相信社区的力量。