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- She laid the picture face downward on the table. 她把那幅画正面朝下放在桌上。
- His figure looks very funny in the concave mirror. 他的样子在凹镜里显得非常可笑。
- An indented or concave surface or area. 凹陷,洼地凹的表面或地区
- A downward tendency, as in the price of a stock. 下降趋势如股票价格等的下降趋势
- Prices started a downward plunge. 价格开始猛跌。
- concave downwardadj. 下凹的
- concave downward utility curve 下凹效用曲线
- He looked downward to avoid my eyes. 他低著头看,以避开我的目光。
- A downward incline or passage; a slope. 斜面,斜坡向下的斜面; 倾斜面
- Projecting downward; overhanging. 向下突出的; 悬伸在外的
- The molten lava got into every nook and cranny on its downward path. 熔岩向下流动时,无缝不钻,无孔不入。
- Just as a double convex lens enlarges, so a double concave lens reduces. 正象双凸透镜可以放大那样,双凹透镜也可以缩小。
- To move a hopper or stacker upward or downward. 上下移动送卡箱或接卡箱。
- A concave molding with a cross section that approximates a quarter circle. 飞檐的凹圆线脚截面近于九十度弧的凹线脚
- A depression similar to that in a shallow concave container for food. 凹形,凹面与浅的凹型盛食物的容器相似的凹处
- A faucet with a nozzle that is bent downward; a bibb. 弯嘴龙头一种带有向下弯曲的喷嘴的龙头; 龙头
- The palm of one's hand is slightly concave. 人的手掌是微凹的。
- A downward inclination or slope. 倾斜向下的倾斜或斜坡
- A concave surface, structure, or line. 凹面、凹形结构、或凹线
- He lies on the ground face downward. 他脸朝下趴在地上。