For the second year in a row, the city's water supply has failed to meet minimum purity requirements.本市的供水已经连续第二年没有达到最低要求的纯净度。What are the minimum requirements for the job?这项工作的最低要求是什么？He has met the basic/minimum requirements for graduation.他达到了毕业的基本/最低要求。Graduate status is the minimum requirement for entry to the teaching profession.研究生学历是从事教学工作的最低要求。