动词
中文翻译：保持
同义词：
['maintain', 'preserve', 'sustain']
例句：
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1.The government is working hard to preserve the environment.
政府正努力保护环境。
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2. The old museum is preserved as a historical site.
旧博物馆被保存为历史遗址。
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3. The team needs to preserve their momentum in the final quarter.
球队需要在最后一刻保持势头。