have a superficial knowledge of

I have only a superficial knowledge of the subject.

我对这门学问只是略知皮毛.

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On the grass-roots have a bit of a superficial knowledge of production management.

对 基层 的生产管理有一点粗浅的认识.

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Many college students have become more superficial, impulsive, interested in a quick profit and less settling and a sense of love on the learning and exploration of professional knowledge, especially for the students who are majoring in laborious majors like geological mining.

不少大学生对于专业知识的学习和探索多了些肤浅、浮躁和急功近利，少了一份沉淀和热爱。

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I have only a superficial knowledge of this subject.

我对这个问题仅略知皮毛.

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It is dangerous that you have a smattering of superficial knowledge on a subject.

对于任何问题一知半解的知识都是危险的.

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