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adj.一天两次的；每12小时一次的
1、semilunar───adj.半月形的
2、semirural───adj.半农村的；半农业的
3、diurnal───adj.白天的；每日的，一日间的；n.日记账；日报，日刊
4、semi-final───半决赛
5、semifeudal───adj.半封建的
6、semifinals───n.半决赛；半决赛阶段
7、semiformal───adj.半正式的
8、semifinal───n.半决赛；半决赛阶段；adj.半决赛的；参加半决赛的
9、semidivine───adj.半神的
1、tide admittance analysis for the semidiurnal wave of the earth tide by use of the vector pattern of ground tilt observed at seismostations is expounded.───阐述如何利用地震台观测得到的地倾斜矢量图对固体潮半日波进行潮汐导纳分析。
2、The diurnal springs correspond to the semidiurnal neaps and vice versa.───全日潮大潮对应于半日潮小潮，反之亦然。
3、Nonmigrating semidiurnal and diurnal tides at 95 km based on wind measurements from the High Resolution Doppler Imager on UARS───基于UARS高分辨率多普勒图像的风测量的95公里处不移动的半日和日潮汐
4、Atmospheric forcing of the oceanic semidiurnal tide───海洋半日潮的大气作用力
5、The semidiurnal variation in GPS-derived zenith neutral delay───在得自GPS天顶中性滞后的半日变化
6、In the marginal seas adjacent to Yantai, tides are regular semidiurnal tides; and tidal currents are diurnal currents.───在烟台外海，潮汐属于正规半日潮性质，而潮流属于日潮流性质。
7、Accordingly, if want to use paper of oil absorption face, semidiurnal frequency is the properest.───因此，若要使用吸油面纸，一天两次的频率是最适当的。
1、A finite difference solution of the diurnal and semidiurnal tides and tidal currents in the Korea Strait is obtained with satisfactory agreement to the observed distribution.
2、FFT results show semidiurnal tides and diurnal tides dominate the current movement.
3、The thermal solar tide therefore consists of several dominant waves, the most prominent being the diurnal and semidiurnal ones.
4、Accordingly, if want to use paper of oil absorption face, semidiurnal frequency is the properest.
5、It is shown that Hong Kong is a good natural port with the subtropical oceanic climate, irregular semidiurnal tide, and the small tide range and current velocity, so it is easy for ships to berth.
6、This procedure applies only to regular semidiurnal tidal waters forecasts and cannot accurately predict full-tide waters (such as the North Bay) and irregular diurnal tidal waters.
7、The amplitudes and phases of diurnal and semidiurnal tides show some quasi-periodic characteristics which may be resulted from nonlinear interaction between tides and planetary waves.
8、The tide admittance analysis for the semidiurnal wave of the earth tide by use of the vector pattern of ground tilt observed at seismostations is expounded.
9、The diurnal springs correspond to the semidiurnal neaps and vice versa.