几倍的英文：
severalfold

Efficiency will Be multiplied several times.
效率将增加几倍。

The operation of determining how many times one quantity is contained in another; the inverse of multiplication.
"确定某数是另一数的几倍的运算,与乘法相反."

It is far superior to the hovel at Woodend, and the small house at Saint Leonard's Crags
它比起伍登的茅舍和圣列奥纳德的小屋，不知要好上几倍。