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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. 她把那幅畫正面朝下放在桌上。
- His figure looks very funny in the concave mirror. 他的樣子在凹鏡里顯得非常可笑。
- An indented or concave surface or area. 凹陷,窪地凹的表面或地區
- A downward tendency, as in the price of a stock. 下降趨勢如股票價格等的下降趨勢
- Prices started a downward plunge. 價格開始猛跌。
- He looked downward to avoid my eyes. 他低著頭看,以避開我的目光。
- A downward incline or passage; a slope. 斜面,斜坡向下的斜面; 傾斜面
- Projecting downward; overhanging. 向下突出的; 懸伸在外的
- The molten lava got into every nook and cranny on its downward path. 熔岩向下流動時,無縫不鑽,無孔不入。
- The garden sloped gently downwards towards the river. 花園呈緩坡向河邊傾斜。
- The monkey was hanging head downwards from the branch. 猴子頭向下倒掛在樹枝上。
- The trend of stock is still downwards. 股票的走勢還是下跌。
- Just as a double convex lens enlarges, so a double concave lens reduces. 正象雙凸透鏡可以放大那樣,雙凹透鏡也可以縮小。
- To move a hopper or stacker upward or downward. 上下移動送卡箱或接卡箱。
- He fell face downwards in the sand. 他臉朝下跌到沙子里。
- She was holding her eyes downwards. 她的一雙眼睛望著地下。
- As the river flows downwards, it widens. 這條河愈到下游愈寬。
- He lay on the floor face downwards. 他臉朝下躺在地上。
- Find the critical number, point of inflection, relative extrema, increasing or decreasing interval, concave upward or downward interval of the function. 找出此函數的端點,反曲點,相對極值,遞增或遞減區間,凹向上或凹向下的區間。