1.US 具有，具备，享有，享用 possession or use of sth 2.US 记忆力，记性 ability to remember things 3.US 挡住，拦阻；保持，保留，容纳 action of holding sth in position or containing it
句型例句
Visual material aids the retention of information.直观材料有助于加强记忆。 They advocate the retention of our nuclear power plants.他们主张保留我们的核电厂。