英语单词knowledge的惯用法 如：A little knowledge is a dangerous thing.(谚语)一知半解是很危险的。He has a wide knowledge of history. 他有广泛的`历史知识。We need a secretary with a knowledge of English. 我们需要一位懂英语的秘书。当然，不用不定冠词而用其他类似词也是可能的。如：He has much knowledge of music. 他很懂音乐知识。He is inter
