Opponents object that, in general, laypersons lack the specialized knowledge to evaluate such advertisements and might ask their physicians for inappropriate medications.

反对者反对说，一般来说，外行缺乏评估此类广告的专业知识，可能会要求他们的医生提供不合适的药物。

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That lack of curiosity produces a relative lack of knowledge, and the lack of knowledge is difficult if not impossible to compensate for later on.

好奇心的缺乏导致了相应知识不足，而知识的缺乏即便可以弥补，但真正做到也是很难的。

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There is a lack of knowledge about the tax system.

大家对税制缺乏了解。

《牛津词典》

Also,there is a widespread lack of knowledge among local health workers about how to use antivenoms.

VOA: special.2010.01.25

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

While the research showed a strong association between knowledge and behavior, it didn't prove that a lack of knowledge causes credit-card misuse or vice versa, Prof.

WSJ: Beware College Students Carrying Credit Cards

However, they often lack knowledge, skills and feel uncomfortable to discuss sensitive issues with children.

UNESCO: PSYCHOLOGIES magazine helps parents in Eastern Europe and Central Asia to bring up healthy and happy children | United Nations Educational, Scientific and Cultural Organization

Now in her 80s, she fears younger generations lack knowledge of the Holocaust.

BBC: Holocaust survivor Henia Bryer: Prisoner number A26188