deficiency

名词 deficiency:

1. the state of needing something that is absent or unavailable
   同义词：lack, want
2. lack of an adequate quantity or number
   同义词：insufficiency, inadequacy

1. The deficiency of this plan is very clear and it can't possibly succeed.
   这项计划的缺陷是很明显的，它不可能成功。
2. I have a slight calcium deficiency.
   我有点缺钙。

de.fi.cien.cy

n.（名词）
【复数】 de.fi.cien.cies
The quality or condition of being deficient; incompleteness or inadequacy.
缺点，缺陷：不完善的性质或状况；不完整或不充足
A lack or shortage, especially of something essential to health; an insufficiency:
缺乏，缺少：不足，尤指对健康十分必需的东西；不够：
例句：
a nutritional deficiency.
营养缺乏