defective material

• 有缺陷的材料

defective material的用法和样例：

例句

1. We decided to make all the defective sheet up.
   我们决定全部重印有缺陷的页码。
2. Evidence is accumulating that a defective gene may be responsible for this disease.
   越来越多的证据表明该疾病是由一种有缺陷的基因引起的。