是不可数名词。通常用a cup of milk ,a milk ,一杯牛奶,一份牛奶时就可数,知道了么,英语应用起来比较随意的抽象名词本不可数,前不加任何冠词,后用单数形式.we long for freedom.但有定语修饰或有特定具体内容时可加the I didn't have the courage to tell you.We enjoyed the beauty of nature.Bob spoke the truth.抽象名词有些在表 “几种”,“几份” 的时候是可数的.