horizon
英 [hə'raɪz(ə)n]
美[hə'raɪzn]
	    - n. [天] 地平线;视野;眼界;范围
 
英英释意
- 1. the line at which the sky and Earth appear to meet
 
- 2. the range of interest or activity that can be anticipated;
 - "It is beyond the horizon of present knowledge"
 
- 3. a specific layer or stratum of soil or subsoil in a vertical cross section of land
 
- 4. the great circle on the celestial sphere whose plane passes through the sensible horizon and the center of the Earth