indentation

英文解釋：

名詞 indentation:

1. a concave cut into a surface or edge (as in a coastline)
   同義詞：indenture
2. the formation of small pits in a surface as a consequence of corrosion
   同義詞：pitting, roughness
3. the space left between the margin and the start of an indented line
   同義詞：indention, indent, indenture
4. the act of cutting into an edge with toothlike notches or angular incisions

英文造句：

1. Having indentations that extend about halfway to the center, as in certain leaves.
   半裂的有鋸齒狀邊緣的，延伸到距中心一半的距離，例如某些葉片