The result shows that the purification efficiency is higher under counter current operation than that under co-current operation.
结果表明：逆流操作的净化效率高于顺流，气(液)体流量对出、进口气(液)体温差有较大影响。
2
Security guards from the Beijing East China Real Estate Development Co., Ltd., the current developer of Ma's land, rushed to the scene and tried to stop the workers before police arrived.
However, a study by McKinsey and co, a consultancy, notes that 40% of current retirees were forced to quit before they wanted to, either because of ill health or because they lost their jobs.