the action of keeping something rather than losing it or stopping it 保持；维持；保留 the action of keeping liquid, heat, etc. inside something rather than letting it escape （液体、热量等的）保持，阻滞 Eating too much salt can cause fluid retention. 摄盐过多会导致体液潴留。 the importance of energy conservation and heat retention 节能和保温的重要性
the ability to remember things 记忆力；记性 see also retain
Word Originlate Middle English (denoting the power to retain something): from Old French, from Latin retentio(n-), from retinere ‘hold back’, from re- ‘back’ + tenere ‘hold’.