retention
noun [ U ] formal uk/rɪˈten.ʃən/ us/rɪˈten.ʃən/
C2 保留;保持;维持
the continued use, existence, or possession of something or someone
Two influential senators have argued for the retention of the unpopular tax. 两位有影响的参议员主张保留这项不得人心的税收。
The retention of old technology has slowed the company's growth. 死守着旧技术不放减缓了这家公司的发展。
water/heat retention 水分保持／热量滞留