名词
中文翻译：占位符
同义词：
['placeholder', 'placeholder', 'dummy', 'placeholder', 'placeholder']
例句：
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1. The program needs a few more placeholders to fill in the blanks.
这个程序还需要几个占位符来填补空白。
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2. The data was filled in with placeholders until we could get a real answer.
数据中用占位符填充，直到我们能得到一个真正的答案。
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3. The website uses placeholders for images that are not yet available.
网站使用占位符来显示尚未提供的图片。