这两个句子都是说三倍大
但是看下面这个
The room is three times larger than that one.
却是说比那个大三倍（也就是四倍）
还有以下表达,供参考
The length of Line AB is four times that of Line CD.线段AB是线段CD的四倍长.
I'm twice/double his age.我的年龄是他的两倍.
I've paid three times the usual price for the ticket.我出了三倍于往常的价格来买这张票.
The production now is three times what it was ten years age.现在的产量是十年前的三倍.