expectancy
n. 期待，期望
复数 expectancies
例句
The average life expectancy was 40.
平均期望寿命曾是40岁。
《柯林斯英汉双解大词典》
The supporters had a tremendous air of expectancy.
支持者满怀期待。
Being taller is associated with longer life expectancy.
个子越高，寿命越长。
