1. as+adj.(adv.)+again+as这种结构用来表示净增加一倍。例如：

This year we have produced as many tractors again as they. 

今年我们生产的拖拉机比他们多一倍（是他们的两倍）。

Wheel A turns as fast again as wheel B.

A轮比B轮转动快一倍。

这种结构也常写作：again+as+adj.（adv.）+as的形式。例如：

The peak power is again as great as the carrier power. 

峰值功率比载波功率大一倍。

2. half+as+adj.(adv.)+again+as这种结构表示前者是后者的一倍半。例如：

This antenna is half as high again as that one. 

这根天线比那根高一半。

此种结构也可写作half+again+as+adj.(adv.)+as的形式。例如：

This machine turns half again as fast as that one.

这台机器比那台机器转速快50%。

责任编辑：admin