是多三倍的意思
“A + be + 倍数 + 计量形容词比较级 + than + B ”
The Yangtze River is almost twice longer than the Pearl River.
长江差不多比珠江长两倍.（是珠江的三倍）
The dictionary is exactly five times more expensive than that one.
这本字典比那本恰好贵5倍.（是那本书的六倍）