Diabetes quadruples the risk for women and doubles it for men.

糖尿病将使女性患病风险增至普通风险水平的四倍(男性为两倍).

Each pulley quadruples the amount of weight a single kite can pull.

每个滑轮的重量是每只风筝载重量的4倍.

Remember that the force required to overcome drag quadruples when doubling the speed, and what impact that have on aircraft weight.

记住当时军队要求在速度翻倍的情况下克服四倍的反作用力，并且飞机的重量对此有影响。