1. These direct light downward to reduce light pollution at night. 这些向下的直射光减少了夜间光污染。
2. I think our prices in the next few years is a steady downward trend. 我想我国的房价在未来几年之内是一种稳步下降的趋势。
3. A toe, usually the second, that is permanently flexed downward, resulting in a claw like shape. 锤状趾一种''。'脚趾'。''，通常是第二趾，由于永久性向下弯曲使其呈爪子的形状。
英英解释
adj.
1. on or toward a surface regarded as a base
2. extending or moving from a higher to a lower place adv.
1. spatially or metaphorically from a higher to a lower level or position
