1·In English, "a" and "an" are called the indefinite article, and "the" is called the definite article.
在英语中，“a”和“an”被称为不定冠词，“the”被称为定冠词。
2·Then there will be an indefinite number of subsequent warnings, which will state that legal action will be taken if the account holder continues to download illegally.
接下来还会有不定数量的警告，这意味着如果此人继续非法下载，那么他将受到法律制裁。
3·We use indefinite pronouns to refer to people and things when we do not know or do not need to mention who or what we are talking about.
当我们不知道或没有必要说明所谈论的人是谁或是什么事物时，我们就用不定代词来指代人或物。
4·The way out of this, for those unwilling to invoke an intelligent creator, is to allow that the observable universe is just one of an indefinite number of universes, each with its own laws of physics.
对于那些不相信有智慧的造物主的物理学家而言，要解决这个让人百思不得其解的立论，就需要令现今人类可观测到的宇宙是不定数量数的宇宙(每个都有自己的物理法则)中的唯一一个。
5·Definite and indefinite articles are unaffected by gender (the actor, the actress; a bull, a cow.)
定冠词和不定冠词不受性别的影响(the actor, the actress； a bull, a cow)。