sem.i.di.ur.nal

semidiurnal的音标和读音：
DJ音标发音： [ˌsemi:daiˈə:nəl, ˌsemai-]
KK音标发音： [ˌsɛmidaɪˈɜnəl, ˌsɛmaɪ-]

semidiurnal的词性：
adj.（形容词）

1. Of, relating to, occurring, or performed during half a day.
半天的：半天的、与之相关的、出现于其的或完成于其的

2. Occurring or coming approximately once every 12 hours, as the tides.
一天两次的：近乎每12小时出现或发生一次的，如潮汐

3. Of or relating to the arc described by a celestial body between its meridian passage and its points of rising or setting.
半日圆拱：天体在其子午圈与升落位置之间描出的圆拱轨迹的或与之相关的