名词
1. （尤指身体所需物质的）缺乏，缺少，不足
Deficiency in something, especially something that your body needs, is not having enough of it.
2. 缺点;缺陷;瑕疵
A deficiency that someone or something has is a weakness or imperfection in them.
1. lack of an adequate quantity or number
e.g. the inadequacy of unemployment benefits
Synonym: insufficiencyinadequacy
2. the state of needing something that is absent or unavailable
e.g. there is a serious lack of insight into the problem
water is the critical deficiency in desert regions
for want of a nail the shoe was lost