★ expand ：to become larger in size, number, or amount, or to make something become larger
① (使)擴大；增加 同義詞：increase
The computer industry has expanded greatly over the last decade.
計算機行業在過去十年間大大地發展起來。
expand knowledge of foreign countries
增加對外國的了解
② v. 擴展;擴大;(使)膨脹:
expand domestic demand 擴大內需
When you heat a metal， it expands金屬遇熱膨脹。
Water expands as it freezes.
水結冰時會膨脹。
▲ 派生詞：
expansion n.擴大，擴張，擴充
The rapid expansion of cities can cause social and economic problems.
城市規模的迅速擴大會帶來各種社會和經濟問題。