名词短语
中文翻译：在
同义词：
['barriers', 'obstacles']
例句：
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1. The company has implemented several CCU bars on to improve security measures.
该公司已经实施了多项CCU障碍，以改进安全措施。
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2. The new policy requires businesses to barons on certain areas of the workplace.
新的政策要求企业在某些工作场所设置障碍。
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3. The construction site is heavily barons on for safety reasons.
为了安全原因，施工现场设置了重重障碍。