a.

1. 又一，再一
   He drank another glass of beer.

   他又喝了一杯啤酒。

2. 另一；另外的
   That's another matter.

   那是另外一回事。

pron.

1. 又一个，再一个
   The little boy finished his cake and asked for another.

   小男孩吃完自己的饼后，要求再吃一块。

2. 另一个
   I don't like this one, please show me another.

   我不喜欢这个，请给我另一个。

det.

pron.

1. used to refer to an additional person or thing of the same type as one already mentioned; a further.
2. used to refer to a different person or thing from one already mentioned.