1.
You will see that it has jagged edges.These are called "perforations".
你会看到锯齿状的边缝，这些就叫孔状接缝。
2.
A notch or jagged cut in an edge.
锯齿状缺口物体边缘“Ｖ”形或锯齿形的缺口
3.
The cells have an irregular shape with a slightly serrated border.
细胞的形状不规则，边缘呈锯齿状。
4.
having an irregularly notched or toothed margin as though gnawed.
有不规则锯齿状的或仿佛被咬过一样有锯齿状边缘的。
5.
a wrench with a V-shaped jaw and serrations on one side (resembles the open jaws of an alligator).
一边有v型锯口和锯齿状隆起的扳手（和鳄鱼的口相似）。
6.
notch on a serrated edge
锯齿形边缘的凹口.
7.
having an uneven outline,edge or surface;jagged
（外形）不规则的;（边缘）锯齿状的;（表面）凹凸不平的
8.
having a margin incised almost to the base so as to create distinct divisions or lobes.
有直达底部的锯齿状边缘以造成明显的分界。
9.
having incised margins with the lobes or teeth pointing toward the base; as dandelion leaves.
有锯齿状边缘的圆裂片或牙齿向下的；像蒲公英叶子一样的。
10.
Most saws take the form of a thin metal strip with teeth on one edge or a thin metal disk with teeth on the edge.
多数锯都是一边带有锯齿的薄金属片或边缘带锯齿的金属圆盘。
11.
Those are jagged rocks.
那些是锯齿状的岩石。
12.
A jagged wound or cut.
锯齿状的伤口或裂口
13.
a jagged piece of glass.
一块锯齿状的玻璃。
14.
roots of teeth [circular saw]
锯齿的根部〔圆锯〕
15.
cut a zigzag or scalloped edge on(sth)
将（某物）的边剪成锯齿形或扇边形.
16.
notched like a saw with teeth pointing toward the apex.
锯齿状的像牙齿顶端一样的。
17.
tooth-like part,eg on a comb,saw or gear
齿状部分（如梳子、锯或齿轮的）.
18.
Having indentations that extend about halfway to the center, as in certain leaves.
半裂的有锯齿状边缘的，延伸到距中心一半的距离，例如某些叶片