semi-annual

adj.occurring or payable twice each year

同义词：semiannualbiannualbiyearly

Lack of benefit from semi‐annual screening for cancer of the lung: Follow‐up report of a randomized controlled trial on a populati...
Features of annual and semiannual variations derived from the global ionospheric maps of total electron content
An Investigation of the Initial Voluntary Environmental Disclosures Made in Korean Semi-Annual Financial Reports
Observations and dynamics of the semi-annual and annual sea levels near the equatorial Indian Ocean boundary
The semi-annual oscillation and Antarctic climate. Part 2: recent changes
[Semi-annual supplement on Vitamin A. Guide for program managers]
Annual, semi-annual and terannual waves in total ozone as derived from TOMS data at the subtropics
Predominant semi-annual oscillation of the upper mesospheric airglow intensities and temperatures in the equatorial region
Seasonal Variation of the Semiannual Oscillation.
Semi-annual oscillations in Saturn's low-latitude stratospheric temperatures.