动词
中文翻译：跛行
同义词：
['slip', 'stumble', 'shuffle']
例句：
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1. He was lag behind in the race because he fell down.
他在比赛中落后了，因为他摔倒了。
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2. The old man lags slowly as he walks to the park.
老人慢慢地走着去公园。
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3.She lags behind her friends in the conversation.
她在谈话中落后于她的朋友们。