enlarge，amplify，expand，increase，magnify，multiply，augment
这些动词均有 增加，增大 或 扩大 之意。
enlarge 主要指面积或体积等的扩大。
amplify 在科技中常指声音的扩大或电磁波的增强。也指补充了细节、详述或扩大内容等。此词系正式用语。
expand 指范围、程度、体积和尺寸等方面的扩大或增加。
increase 指数量、强度和大小等方面的扩大或增加。
magnify 可指用光学仪器使物体看上去显得变大;也指事实上把某物增大，有时用于夸张意味。
multiply 通常指自然繁殖而产生的增长，有时也指同类事物数量的成倍增加。
augment 较正式用词，一般指在原有的基础上增加含量而扩大。
参考例句
1. They hope to expand their company.
他们希望扩大公司的规模。
2. I think we need to expand.
我认为我们必须再扩展。
3. We also hope to expand our business with you.
我们也盼望与贵公司扩大商业往来。
例句
1.V-T/V-I If something expands or is expanded, it becomes larger. 扩大; 膨胀
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。