如何删除此特定语句中的重复行

def remove_duplicate_lines(text):
    lines = text.split('\n')
    unique_lines = set()
    result = []

    for line in lines:
        if line not in unique_lines:
            unique_lines.add(line)
            result.append(line)

    return '\n'.join(result)

# 示例用法
text = """
This is a duplicate line.
This is a unique line.
This is a duplicate line.
This is another unique line.
"""

clean_text = remove_duplicate_lines(text)
print(clean_text)

This is a duplicate line.
This is a unique line.
This is another unique line.