Bùkěshǔmíngcí qiánmiàn tōngcháng bù jiā guàncí " a ".
Uncountable nouns usually don't take the article 'a'.
Tips
grammar
Standard term in English-grammar instruction. Note that the count/uncount distinction is largely a feature of European languages - Chinese nouns aren't really categorized this way and instead use measure words for everything.
