有缺陷的

Evidence is accumulating that a defective gene may be responsible for this disease.

越来越多证据表明该疾病是由一种有基因引起。

An educational system which fails to teach basic arithmetic is seriously deficient.

一个沒教基础算术知识教育体制是有严重。

Set of stamps in the above designs and in a third design showing a woman quilling was prepared in 1920, but not issued price of set, $4, exist with “SPECIMEN” overprint and imperf counterfeits exist.

1920邮票样票，因印刷套印错误，未发行，存世仅有样票和有伪造票（膺品票）。