2. A shallow notch, cut, or indentation on a surface. 表面上的较浅的刻槽、刻痕或缺口。
3. They are written with a carbon-based ink, from right to left, using no punctuation except for an occasional paragraph indentation. 他们用碳为基础的墨水书写，从右边到左边，除了作为一个偶然的段落压痕之外没有标点。
英英解释
n.
1. a concave cut into a surface or edge (as in a coastline)
2. the formation of small pits in a surface as a consequence of corrosion
3. the space left between the margin and the start of an indented line
4. the act of cutting into an edge with toothlike notches or angular incisions
