题目内容：

英语中表达倍数的用法
The enlarged school campus is____the old one.
A.as three times big as B.three times as big as
C.bigger three times than D.as big as three times
求详细的关于表达倍数的用法?
厄....我知道选B...我要求详细的倍数的正确例子，.

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