他把纸裁成大小相等的四张。

He cut the paper in four equal pieces.

作用力与反作用力大小相等、方向相反.

Action and reaction are opposite and equal.

节点内力总是成对浮现,其大小相等而标的目的相反.

Internal forces at connections occur only as pairs of equal opposite forces.

多样性指数之间的比较，需要样方的面积大小相等，否则没有实际意义。

Shannon-Wiener index and Pielou evenness index were used to compare and check the feasibility of rarefaction in practice.

射击也是个很好的例子，枪对子弹施加力,子弹对枪会有后坐力,大小相等。

If you fire a gun, the gun exerts a force on the bullet the bullet exerts an equal force on the gun which is called the recoil.

牛顿第三定律又说，每一个作用力都有一个大小相等、方向相反的反作用力。

And Newton's Third Law states that for every action, there is an equal and opposite reaction.