semi-annual sale年中减价
semi-annual instalments翻译;半年一期的分期付款
semi-annual cycle半年循环
semi-annual tide半年周期潮
semi-annual variation电离层半年变化
semi-annual sampling半年一次取样
semi-annual interest半年期利息
Semi-Annual Channel半年期通道;半年渠道版
semi-annual installments按半年付款
ADJ（形容词） A semiannual event happens twice a year. 一年两次的 [美国英语][usu ADJ n]
...the semiannual meeting of the International Monetary Fund.
...一年两次的国际货币基金组织会议。