“四倍”造句

过去五年中，销售额已增长至以前的四倍。
Sales have quadrupled in the last five years.

过去几年中销售量较原来的增加了四倍。
Sales have quintupled over the past few years.

这座城市的空气污染程度曾高达可接受标准的四倍.
Air pollution in the city had reached four times the acceptable levels.

• #四倍