1.
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。
2.
The recess can be open to the top, with the integral blade subassembly being lowered into the recess, or the recess can open to the bottom, with the integral blade subassembly being raised into the recess.
凹穴开口向上时，整体的刀片组就下放入凹穴；凹穴开口向下时，整体的刀片组就往上塞入凹穴。
3.
"My brother said to me, `Let us take to the hollow road.'
我哥向我说：“我们从那条凹下去的路走吧。”
4.
A slight depression or indentation in a surface.
凹痕表面上轻微的下陷或凹陷
5.
An opening or recess in a wall.
壁凹；墙洞墙上向内凹或向外凸的部分或孔隙
6.
The downward failure of the roof, which was dished 2 feet was the only important structural damage suffered.
这个建筑物中唯一重大的破坏是屋顶向下凹陷了两呎。
7.
Spook and Aaron cupped their hands under his foot and heaved him up to the first branch.
斯布克和亚伦把手凹起来放在他的脚下把他举向第一个树枝上。
8.
Her cheeks fell in after the illness
病后，她的双颊凹下去了。
9.
A gutter under the eaves of a roof.
水槽屋檐下的凹槽：
10.
His eyes [cheeks] have sunk in.
他的眼睛[面颊] 凹下去了。
11.
His eyes had sunk in.
他的眼睛凹下去了。
12.
Her eyes have sunk in.
她的眼睛凹下去了。
13.
Her eyes have sunk.
她的眼睛凹陷下去了。
14.
Notch- An indent on the edge of a wafer used for orientation purposes.
凹槽-晶圆片边缘上用于晶向定位的小凹槽。
15.
A split or indentation between two parts, as of the chin.
开裂，凹陷两部分间（如下巴）的裂隙或凹口
16.
the steps even seemed a parti-colored sea, that was impelled towards the portico;
台阶上象是一股杂色斑驳的海流，向门廊下拼命的挤，墙上每一年凹进去的地方都拱着活的雕像。
17.
Because of long illness his eyes fell in.
由于长期生病，他的双眼向内凹陷。
18.
a box pleat reversed so that the fullness is turned inward.
箱状褶翻转导致凸的部分向里凹进去。