diurnal variation 日[夜]變化diurnal wave 日波diurnal wind 日變風divergence 散度；輻散divergence damping 輻散阻尼divergence equation 輻散方程divergence field 輻散場divergence line 輻散線divergence theorem 輻散定理divergence theory of cyclogenesis 旋生輻散說divergence-vorticity ratio 輻散渦度比divergent flow 輻散流divergent wind 輻散風divergent wind component 輻散風分量diverging beam 輻散波束diversity reception 多向接收divide 分水嶺；氣候分界divide line 分水線dividing crest 分水嶺dividing ridge 分水嶺dividing streamline 分界流線division 除法；分度D-layer D層Dobson spectrophotometer 杜