单词semi-monthly
n.: 半月刊网络: 半月交;半月供;半月付
半月刊
The syzygial tide is that the maximum amplitude period of semi-monthly tide added to the semi-diurnal and full-diurnal tides.
朔望潮即是半月潮幅度最大时段再迭加半日潮和全日潮。