deficiency
n. 缺乏，不足；缺陷，瑕疵；赤字
复数 deficiencies
例句
Vitamin deficiency in the diet can cause illness.
饮食中缺乏维生素可能导致疾病。
《牛津词典》
Opacity of the eye lens can be induced by deficiency of certain vitamins.
眼球晶状体的混浊可由缺乏某些维生素引起。
《柯林斯英汉双解大词典》
The most serious deficiency in NATO's air defence is the lack of an identification system to distinguish friend from foe.
北约防空的最大缺陷就是缺乏能够辨认敌友的识别系统。
