名词
中文翻译：入口块
同义词：
['access block', 'barrier']
例句：
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1.The construction crew had to clear the entry block before they could start work.
施工队在开始工作之前必须清除入口障碍物。
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2. The new security system requires an entry block to be installed at the entrance.
新的安全系统要求在入口处安装一个入口障碍物。
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3. The car was stopped by a police officer at the entry block.
汽车在入口处被一名警察拦下。