alternate bearing

Review on physiological mechanism of alternate bearing in Citrus;

柑桔隔年结果的生理机制研究进展

Another is one-more-year annuity, called interval-annuity, which is an expansion of the range of annuity.

根据收付间隔期的长短可将年金重新划分为两类:一类为传统意义上间隔期为1年的年金,统称为"年度年金";另一类是间隔期为1年以上的年金,称"间隔年金",这是对年金应用范围的扩充。