The case against is twofold: too risky and too expensive.反对理由有两点：太冒险而且太昂贵。a twofold rise in prices价格上涨一倍The problem was twofold.这个问题分两个部分。The value of the new Cordinate Systems and surfaces is twofold.新坐标系和坐标曲面的价值是双重的....
The case against is twofold: too risky and too expensive.反对理由有两点：太冒险而且太昂贵。The problem was twofold.这个问题分两个部分。The value of the new Cordinate Systems and surfaces is twofold.新坐标系和坐标曲面的价值是双重的....