如果我有任何注释，我会写在页边空白处。

If I have any notes, I'll write them in the ___margin.

他发现重要的线索写在那本旧书的页边空白处。

He found important clues written in the ___margin of the old book.

打印文档时，确保四周留出一英寸的页边距。

Make sure to leave a one-inch ___margin on all sides when printing the document.