英语词组：A是B的2倍长

A is twice of B in length。A is twice as long as B A is twice the length of B。A is as long as twice the length of B。Length of A doubles that of B。A is of twice the length of B。Length of A is the double of B。A has double length of B。A has a length of the twice of B。A has the duplex length of B。A is of the twofold length of B。A is 100% longer than B。B is a half of A in length。B is 50% shorter than A。。。。注：twice、double、triple 最常用于口语中,在数理化表达中可用 two times、200%、three times 这些替换使用,意思相同。is 可以用 equals 、has 等替换,twice 和 100% 可以在颠倒主谓语后以 a half 和 50% 替代。作为数理语言,实际表达方式可以有近乎无数种组合,没有对错,只有好坏、简练与否的区别。注意,在使用longer than这种表达法时,必须注意倍数使用正确。譬如：A is 2 times （或 200%）longer than B 意味着A是B的3倍长!最后,注意虽然有这么多的表达法,但并不代表任何表达都是对的!这里出现了不少病句。例如：A is B's double long 是错的,因为long 不是名词。A's length is double longer than B 也是错的,因为double不能像twice那样作副词使用。