例：Engineers noticed that the pipes were not expanding as expected.

　　工程师们注意到管子并未像预期的那样膨胀。

　　例：We have to expand the size of the image.

　　我们不得不扩大图像的尺寸。

　　2.V-T/V-I If something such as a business, organization, or service expands, or if you expand it, it becomes bigger and includes more people, goods, or activities. 使 发展; 发展

　　例：The popular ceramics industry expanded toward the middle of the 19th century.

　　大众陶瓷业在19世纪中叶得到了发展。

　　常见用法

　　用作动词

　　Metals expand when they are heated.

　　金属遇热则膨胀。

　　Would you expand upon the matter a little further?

　　请你再进一步谈谈这件事好吗?

　　They conferred on the best way to expand business.

　　他们商议扩展业务的最好方法。

　　Our foreign trade has expanded during recent years.

　　近年来我们的对外贸易有所增加。

　　The petals of many flowers expand in the sunshine.

　　许多花的花瓣在阳光中绽放。

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