求翻译：不定冠词，是虚词，本身不能单独使用，一般没有词义，它用在名词的前面，帮助指明名词的含义。我们学过的冠词有两种，一种是定冠词，另一种是不定冠词。不定冠词 a (an)与数词 one 同意，是"一个"的意思。a 用于辅音音素前，而 an 则用于元音音素前，。使用哪个，要看名词的发音，如果开头音标是元音就用 an,如果是辅音就用 a,举例说明： 苹果 apple 的开头音是元音 所以用 an,一个苹果， an apple(P75)。汉堡 hamburger 的开头音是辅音所以用 a,一个汉堡 a hamburger。（P75）是什么意思？

Indefinite article, is a function word itself can not be used alone, generally do not have the meaning of a word, it is used to help specify the meaning of the term in front of the noun. Article we learned there are two, one is the definite article, another indefinite article. The indefinite article

indefinite article, and is the virtual word itself cannot be used separately, in general, there is no meaning, it is used in front of the noun to help specify the term meaning. We learned the word, there are two types of is a word, the other is a indefinite article. Indefinite Article a number (An)

Indefinite articles are empty words, by itself cannot be u