"Business is growing quickly" 表示商业发展得很快。

这是一句常见的英文表达，来源于英文中描述商业发展情况的常用词汇和短语。

下面是一些例句：

Our company's business is growing quickly thanks to the new product pne. (我们公司的商业正在快速增长，这要归功于新的产品线。)
The market for this type of product is expanding rapidly, and our sales are growing quickly as a result. (这种产品的市场正在快速扩张，我们的销售额也随之快速增长。)
We've seen a lot of growth in our business over the past year. (在过去的一年里，我们的商业发展得很快。)

此外，还可以用其他表达来描述商业发展快速，如：

Business is booming. (商业繁荣。)
Our business is expanding at a rapid pace. (我们的商业正在以快速的速度发展。)
Sales are skyrocketing. (销售额正在快速增长。)