[ 'laiftaim ] 柯林斯星级 ★★☆☆☆ BNC词频 3623 COCA词频 2767 n. 一生, 终生 a. 一生的, 终生的 n the period during which something is functional (as between birth and death) 复数: lifetimes 英汉双解字典由 ECDICT 提供