horizon n. 1.地平;地平線;地平圈。 2.地平儀,水平儀。 3.【地質學;地理學】地層,層位。 4.眼界,視界;范圍,見識。 apparent horizon【氣象學】視地平。 artificial [false] horizon人造地平。 celestial horizon【氣象學】天球地平。 the horizon of knowledge 知識范圍。 radar horizon雷達地平,雷達作用距離。 horizon of soil 土層。 true horizon【氣象學】真地平。 visible horizon【氣象學】可見地平。 Science gives us a new horizon. 科學使我們大開新的眼界。 widen one's horizon開闊眼界。 on the horizon 在地平線上,剛冒出地平線。
( 3 ) the spatial analysis results showed that the variation of soil clay content was moderate at the direction of vertical section . the soil clay content was highest at the layer of 20 - 40cm , which showed that it is an eluvial accumulation horizon according to long - term cultivation , irrigation and rainfall ( 3 )土壤粘粒含量在垂直方向上呈中等變異,整個土體在20 - 40cm土層處的粘粒含量最高,說明土壤表層由于長期耕作、灌溉降雨,土壤粘粒含量有一個淋溶淀積過程。