1. 视地平线：视场对比 simultaneous contrast | 视地平线 apparent horizon | 视距 sighting distance
2. 视地平：视地平 apparent horizon | 视质量 apparent mass | 视轨道 apparent orbit
3. 地平线：apparel 衣服 | apparent horizon 地平线 | apparent 显然的
4. 可见地平：apparent force 表观力 | apparent horizon 可见地平 | apparent lifetime 表观寿命
noun
1. the line at which the sky and Earth appear to meet
Synonym: horizon visible horizon sensible horizon skyline