因此，初次修理的不足并不是因为技工缺乏能力；更确切地说，很明显复杂的修理需要一种高度集中的能力。

When initial repairs are inadequate, therefore, it is not because the mechanics lack competence; rather, there is clearly a level of focused concentration that complex repairs require.

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红血球数量不足是铁元素缺乏造成的。

Deficiency of red corpuscles is caused by a lack of iron.

《柯林斯英汉双解大词典》

这种方式的不足之处是缺乏明确的指挥。

The downside of this approach is a lack of clear leadership.

《柯林斯英汉双解大词典》

First, let's talk about malnutrition. Now usually that concept gets used to talk about too little nutrition, but in fact, if you consider mal to mean poor rather than too little, and poor nutrition can really get manifested as under-nutrition, over-nutrition, or just unhealthy eating in general.

我们首先谈谈营养不良,现在我们通常把这个概念视同于缺乏营养,但实际上理解为"不好的",比"不足"更为恰当,一般而言,不好的营养可以被理解为,营养不足,营养过剩,或者仅仅是指不健康的饮食

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选