名词
中文翻译：流沙
同义词：
['slippery', 'treacherous']
例句：
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1.The river was so quicksand that it was difficult to cross.
这条河是流沙，很难过。
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2.The hiker slipped and fell into the quicksand.
这个徒步旅行者滑倒了，掉进了流沙里。
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3. The quicksand made it difficult for the rescue team to reach the victims.
流沙使得救援队难以到达受害者那里。