1·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。
—— 《柯林斯英汉双解大词典》
2·A major observation is a serious deficiency.
一个主要的问题就是一个严重的缺陷。
3·But there exists very serious deficiency of the theory.
但是，这一学说却存在着严重的理论缺陷。
4·It gets harder to absorb vitamin B12 from food as you age, and a serious deficiency can look a lot like Alzheimer's disease.
随着年龄的增加，从食物中吸收维他命b 12变得更加困难，B12的严重不足会使你看起来像是患有老年痴呆症。
5·Now with the increasing communication with foreign countries, English as a communicative tool for Chinese learners has shown its serious deficiency in productive vocabulary acquisition.
当前随着对外交流的日趋频繁，对于中国学习者来说，英语作为一种交流工具也显现出它在产出性词汇习得上的严重不足。
6·In parts of South America, vitamin-A deficiency is a serious health problem, especially among children.
在南美部分地区，缺乏维生素 A 是一个严重的健康问题，尤其在儿童之中。
7·The integumentary system (which includes hair and nails) is often the first place that a serious vitamin deficiency shows up.
当维生素缺乏时，首先会变现在表皮系统（包括毛发和指甲）。
8·AIDS (acquired immune deficiency syndrome) is the final and most serious stage of HIV disease, which causes severe damage to the immune system.
获得性免疫缺陷症(AIDS)是由HIV(人体免疫缺陷病毒，艾滋病病毒)导致的疾病的最终和最严重的阶段，通常会导致人体免疫系统的严重损伤。
9·The character of date tree cultivar at present has different deficiency, and degeneration is serious.
现有枣树栽培品种性状各有不足，而且退化现象严重。
10·It is serious soil arid in Karst areas because of leaking of water from the rock. Deficiency of water and fertilizer, it has influence on the production of the fruit tree.
岩溶地区由于岩石漏水，造成土壤干旱严重，致使农作物经常缺水缺肥，影响果树的生产。