Maintaining the ratio of working to retirement years is a reasonable first approximation to a guideline for determining the eligible age for retirement and health benefits.

维持工作和退休时间的比率是决定退休和医疗保障的合适年龄的第一步。

youdao

Mr Rose has swept away any lingering guesswork and approximation about the intellectual life of the British working classes in the industrial age.

ECONOMIST: Cultural history