名词
中文翻译：防御
同义词：
['protect', 'guard', 'defend']
例句：
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1.The soldiers were vigilant in their defense of the border.
士兵们警惕地守卫着边境。
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2.The police were called to help with the defense of the city during a riot.
警察被召来帮助在暴动期间保护城市。
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3. The company's defense against lawsuits was strong.
该公司对诉讼的防御非常有力。