have a superficial knowledge of;a smattering of knowledge;half knowledge;have half-baked knowledge;sciolism ;

His skill was diplomacy; his briefing on weapons system had obviously been rudimentary.
他是外交专家, 虽然听过有关武器系统的情况介绍,显然还是一知半解.
来源:词典精选例句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.
来源:词典精选例句Griffiths is glib and has a lot of superficial information on a number of subjects.
格里菲思能说会道,对许多问题都有点一知半解.
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