horizontal

a.水平的，地平线的

hoot, Hoover, hooves, hop, hop-field (also hop-garden), hop-picker, hop-pole, hope, hope chest, hopeful, hopefully, hopefulness, hopeless, hopelessly, hopelessness, hopped-up, hopper, hopscotch, horde, horizon, horizontal hormone, hormonal, hormone, horn, horn of plenty, horn-blowing, horn-rimmed, hornbeam, hornbill, horned, hornet, hornless, hornlike, hornpipe, horny, horoscope, horrendous, horrendously, horrible, horribly,