动词
中文翻译：落后
同义词：
['fall behind', 'be behind in']
例句：
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1. The economy is lagging behind the rest of the world.
经济正在落后于世界其他地区。
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2. The project was delayed due to unexpected technical issues.
由于技术问题，项目被推迟了。
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3. The company is lagging behind its competitors in terms of innovation.
该公司在创新方面落后于竞争对手。