occurring every 6 months or during each 6-month period

listen to the pronunciation of occurring every 6 months or during each 6-month period
Английский Язык - Английский Язык

Определение occurring every 6 months or during each 6-month period в Английский Язык Английский Язык словарь

occurring every 6 months or during each 6-month period
semestrial
occurring every 6 months or during each 6-month period
semestral