half-hourly

adj, adv (done or occurring) every thirty minutes 每半小时（做或发生）一次（的）: a half-hourly news bulletin 每半小时发布一次的新闻简报 * The buses run half-hourly. 公共汽车每半小时一班.

halcyon, hale, half, half board, half cock, half holiday, half moon, half nelson, half pay, half-and-half, half-back, half-baked, half-brother, half-caste (also half-breed), half-crazed, half-crown, half-dozen, half-hardy, half-hearted, half-heartedly, half-length, half-life, half-light, half-listen, half-mast, half-naked, half-note, half-price, half-seas-over, half-sister, half-size, half-term, half-timbered, half-time, half-tone, half-track, half-truth, half-way, half-whisper, half-wit,