保险公司要维持运作，必须依赖某种特定的客户搭配：他们需要一定的健康人群(低风险)来支付保险费，这类人实际很少需要补偿，由此保险费可以在客户间分摊。
Insurance companies depend on a mix of clients: they need a certain number of healthy individuals (low-risk) to pay premiums and not use a lot of services so that the premium prices can average out.
结果表明，轴向折射率梯度在一定条件下可以补偿径向折射率梯度的影响。
Results show that the axial index gradient can compensate the effect caused by radial index gradient in some cases.
实验表明，本文采取的回弹预测方法可以将回弹预测误差控制在一定的范围内，采取的补偿措施在零件加工中取得了满意效果。
Experiment results show that the new prediction method can control the rebound forecast error within a certain range, the compensate measures has been achieved good results.
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