n.
有缺陷, 缺乏

[ noun ]
the state of being defective
<noun.state>

Defective \De*fect"ive\, a. [L. defectivus: cf. F. d['e]fectif.
See {Defect}.]
1. Wanting in something; incomplete; lacking a part;
deficient; imperfect; faulty; -- applied either to natural
or moral qualities; as, a defective limb; defective
timber; a defective copy or account; a defective
character; defective rules.

2. (Gram.) Lacking some of the usual forms of declension or
conjugation; as, a defective noun or verb. --
{De*fect"ive*ly}, adv. -- {De*fect"ive*ness}, n.