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如何让字符串随屏幕宽高比居中?尝试.center和len()未果

Markdown Formatting Instructions

Use the following rules to format content with Markdown:

Heading Formatting

  • Use number signs (#) at the start of a line to create headings. The number of signs determines the heading level:
    • # for Heading 1 (largest)
    • ## for Heading 2
    • ### for Heading 3, and so on up to ###### for Heading 6 (smallest)

List Items

  • Start each unordered list item with a dash (-). For nested lists, indent the items with spaces:
    • Main list item
      • Nested sub-item

Text Emphasis

  • Wrap text with single asterisks (*) to make it italicized: This is emphasized text
  • Use double asterisks (**) for bold text: This is bold text

Code & Commands

  • Surround single-line code or commands with backticks (`): npm install package-name
  • For multi-line code blocks, use triple backticks (```):
    function greet(user) {
        return `Hello, ${user}!`;
    }
    

Quoted Text

  • Prefix lines with a greater-than sign (>) to create blockquotes:

    This is a quoted paragraph.
    It can extend across multiple lines.

  • Wrap the link text in square brackets ([]), followed by the URL in parentheses (()): Project Repository

Images

  • Add an exclamation mark (!) at the start, then wrap alt text in square brackets, followed by the image URL in parentheses: Team Logo
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最近更新时间:2026.07.19 08:25:32