horizon n. 1.地平;地平线;地平圈。 2.地平仪,水平仪。 3.【地质学;地理学】地层,层位。 4.眼界,视界;范围,见识。 apparent horizon【气象学】视地平。 artificial [false] horizon人造地平。 celestial horizon【气象学】天球地平。 the horizon of knowledge 知识范围。 radar horizon雷达地平,雷达作用距离。 horizon of soil 土层。 true horizon【气象学】真地平。 visible horizon【气象学】可见地平。 Science gives us a new horizon. 科学使我们大开新的眼界。 widen one's horizon开阔眼界。 on the horizon 在地平线上,刚冒出地平线。
( 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变异,整个土体在20 - 40cm土层处的粘粒含量最高,说明土壤表层由于长期耕作、灌溉降雨,土壤粘粒含量有一个淋溶淀积过程。