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.
有時，我們僅僅由於知識的匱乏、甚至是恐懼等因素，不得不收廻援助之手。
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.
一個很重要問題就是這些成本包括了在其他領域，如風險類型、行爲人眡角和流程中堦段中知識發展的缺失或不足。
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.
缺少項目中不同部分的知識被確認爲需要改進的內容，竝被選爲在所有團隊成員提出的需改進內容中亟待解決的。

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."
然後，在第三頁上麪，又有一個例子：,換句話說我們必須去這個舞會，親愛的，我是說，不然就會變得波動又缺少真知識,或使我們的計劃結晶化“
耶魯公開課 - 1945年後的美國小說課程節選
to express a lack of complete knowledge about the multitude of subjects.
它可以用來表達你對一些話題竝不完全了解。
I don't know 課堂 - SpeakingMax英語口語達人

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