名词
中文翻译：左边界
同义词：
['left side', 'left boundary']
例句：
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1.The text is too long; I need to adjust the left margin.
文本太长了，我得调整左边界。
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2. The designer decided to change the left margin of the website.
设计师决定改变网站的左边界。
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3. The book's left margin was filled with notes and diagrams.
这本书的左边界被笔记和图表填满了。