乘四次方;
Two to the fourth power is sixteen.
2的四次方等于16.
Stem stiffness depends the elastic modulus the material and to the fourth power of the diameter.
假体柄的刚度由制备材料的弹性模量决定且与直径的4次方成正比.
We can raise any number to the fourth power by squaring it twice.
我们能把任一数平方两次就得到它的四次方.
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