名词
中文翻译：块状物
同义词：
['obstacle', 'barrier', 'blockade']
例句：
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1.The construction of the new bridge was a major block to their progress.
新桥梁的建设对他们的进展造成了重大阻碍。
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2. The road was blocked by a large truck.
一辆大卡车挡住了道路。
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3. The police were called to clear the blockade on the river.
警察被召来清除河流上的障碍。