vt.

1. 展開，張開（帆，翅等）
   The eagle expanded its wings.

   老鷹展開翅膀。

2. 使膨脹；使擴張
3. 擴大；擴充；發展
   He is thinking of expanding his business.

   他正考慮擴展他的生意。

4. 詳述
   They have expanded my view on the question.

   他們已更充分地闡明了我對這個問題的觀點。

vi.

1. 展開，張開
2. 擴張；發展；增長
   In ten years the city's population expanded by 12%.

   十年之中，該城人口增加了百分之十二。

3. 膨脹
   Water expands when it freezes.

   水結冰時體積膨脹。

   A tire expands when you pump air into it.

   輪胎打了氣就會脹大。

4. 詳細說明[（+on/upon）]
5. 變得和藹可親；感到心曠神怡；變開朗
   My father expanded a little when he had had a drink, and started to talk more freely.

   我父親小酌之後，就變得開朗可親些，話也說得多了。

   Her face expanded in a smile.

   她笑逐顏開。

v.

1. make or become larger or more extensive.
2. (expand on) give more details about.
3. become less reserved.