lack of knowledge

基本解释

Sometimes we are simply held back from helping others through lack of knowledge or even fear of stepping up.
有时，我们仅仅由于知识的匮乏、甚至是恐惧等因素，不得不收回援助之手。
Importantly, the costs are ones of omission or lack of knowledge development in the other areas such as venture type, actor perspective, and stage of the process.
一个很重要问题就是这些成本包括了在其他领域，如风险类型、行为人视角和流程中阶段中知识发展的缺失或不足。
Lack of knowledge of the different parts of the project was identified as something to be improved, and was selected for focus from all topics suggested by team members.
缺少项目中不同部分的知识被确认为需要改进的内容，并被选为在所有团队成员提出的需改进内容中亟待解决的。

Also,there is a widespread lack of knowledge among local health workers about how to use antivenoms.
And then, on the top of 3, we get another example: "In other words we've got to get on the ball, darling, what I'm saying, otherwise it'll be fluctuating and lack of true knowledge or crystallization of our plans."
然后，在第三页上面，又有一个例子：,换句话说我们必须去这个舞会，亲爱的，我是说，不然就会变得波动又缺少真知识,或使我们的计划结晶化“
耶鲁公开课 - 1945年后的美国小说课程节选
to express a lack of complete knowledge about the multitude of subjects.
它可以用来表达你对一些话题并不完全了解。
I don't know 课堂 - SpeakingMax英语口语达人

The lack of knowledge and preparedness should no longer surprise you when companies make unpopular decisions.
FORBES: 4 Reasons Rejection Shouldn't Be Taken Personally