正文

VOA慢速英语:How 3-D Printing Can Create Tissue from Stem Cells

2016-06-20来源:VOA

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词汇讲解：

1. replace vt.代替; 替换
例句：We undertake to replace any product not up to the specifications.
产品不合规格，保证退换。

2. produce vt.产生; 生产; 制作
例句：Hard work and enthusiasm can produce success.
努力工作及热忱会导致成功。

3. substance n.物质，材料; 实质
例句：Later he became a man of substance.
后来,他成为有大量资产的人。

4. believe vt. 相信; 信任; 以为
例句：Whom should we believe?
我们应该相信谁呢？