★ expand ：to become larger in size, number, or amount, or to make something become larger

① (使)扩大；增加 同义词：increase

The computer industry has expanded greatly over the last decade.

计算机行业在过去十年间大大地发展起来。

expand knowledge of foreign countries

增加对外国的了解

② v. 扩展;扩大;(使)膨胀:

expand domestic demand 扩大内需

When you heat a metal， it expands金属遇热膨胀。

Water expands as it freezes.

水结冰时会膨胀。

▲ 派生词：

expansion n.扩大，扩张，扩充

The rapid expansion of cities can cause social and economic problems.

城市规模的迅速扩大会带来各种社会和经济问题。