名词
中文翻译：障碍物
同义词：
['obstacle', 'barrier', 'impediment']
例句：
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1.The car was stuck in the traffic jam at the entrance to the city.
汽车被堵在进城的入口交通堵塞中。
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2.The project encountered several obstacles during its implementation.
该项目在实施过程中遇到了几个障碍。
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3. The new policy has created a number of challenges for businesses.
新政策给企业带来了许多挑战。