Skyline 
(thuộcchân trời ở chân trời ngang nằm ngang (trục hoành) 
horizontal like: chân trời → →
from all four corners of the world ☊ 
từ bốn chân trời khác nhau ☊ 
der Horizont ☊ chân trời ☊ 
☊ Smoke appeared on the horizon. ☊ appear ☊
The sun was a huge ball of fire low on the horizon. ☊ ball ☊
The helicopters appeared as two black dots on the horizon. ☊ dot ☊
On the horizon, she saw a flash of silver—the sea! ☊ flash ☊
Storm clouds are forming on the horizon. ☊ form ☊
The sun sank lower towards the horizon. ☊ low ☊