He is very childish but of indefinite age.

他很幼稚，但不知道确切的年龄。

It means a number bigger than one, but it's indefinite.

它的意思是比一更大的数字，但它是不确定的。

" No one" is an indefinite pronoun meaning " no person."

“No one”是一个不定代词，意思是“no person”（没有人）。

Another rule for the indefinite articles " a" and " an" .

不定冠词“a”和“an”的另一个规则。

Mr Gunay says only an “indefinite” loan will suffice.

居纳伊说“无限期的出借”就足够了。

So it means starting an illness — an indefinite Illness.

所以它的意思是开始生病——一种不确定的疾病。

And notice that the time is indefinite again.

而且注意，时间又是不确定的。

Otherwise, we would need an indefinite article which is not there.

否则，我们将需要一个不定冠词，而题目中没有不定冠词。

In the English language, there are definite and indefinite articles.

在英语中有定冠词与不定冠词。

Our final expanded indefinite pronouns today begin with the word " every-."

我们今天最后一个扩展型不定代词以“every-”开头。