单词 semi-annual 释义 semi-annual, a. (and n.)[semi- 6 b. Cf. L. smi-annuus in sense 2, and F. semi-annuel.]1. Recurring every half-year; half-yearly.1794[see semi-diurnal 2].1803Phil. Trans. XCIII. 470 Semi-annual solar Equation, Precession, and Refract...