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....
Keep your spending on luxuries down to manageable proportions.将你在奢侈品上的花费降至可控范围。In the tropics plants grow to huge proportions.在热带，植物会长得非常高大。a financial crisis of mammoth proportions极其严重的金融危机...
Unusually heavy rains are also affecting people in Ivory Coast, Mauritania, Mali, Liberia, and Gambia.异常的是,大雨还影响了象牙海岸, 茅利塔尼亚, 马里, 利比亚和甘比亚的人民.He's already been to Tunisia, and is to go on to Morocco and Mauritania.....