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- He lay face downwards on his bed. 他俯卧在床上。
- 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。
- 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。
- The garden sloped gently downwards towards the river. 花园呈缓坡向河边倾斜。
- The monkey was hanging head downwards from the branch. 猴子头向下倒挂在树枝上。
- The trend of stock is still downwards. 股票的走势还是下跌。
- 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。
- He fell face downwards in the sand. 他脸朝下跌到沙子里。
- She was holding her eyes downwards. 她的一双眼睛望着地下。
- As the river flows downwards, it widens. 这条河愈到下游愈宽。
- He lay on the floor face downwards. 他脸朝下躺在地上。
- Find the critical number, point of inflection, relative extrema, increasing or decreasing interval, concave upward or downward interval of the function. 找出此函数的端点,反曲点,相对极值,递增或递减区间,凹向上或凹向下的区间。