average life expectancy

• 平均期望寿命,平均寿命预期值

average life expectancy的用法和样例：

例句

1. Before OPEC, the average life expectancy of cartels had been so short that the economic analysis of cartels tended to stress the inevitability of their collapse.
   在石油输出国组织以前，卡特尔的平均期望寿命是如此之短，以致对卡特尔的经济分析往往是强调其解体的不可避免性。