名词
中文翻译：Unknown
同义词：
['mouse guardian', 'rat protector']
例句：
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1.The cat was the ratguard of the house, keeping the mice away.
那只猫是房子的老鼠守卫，把老鼠赶走了。
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2. The farmer used a ratguard to keep his crops safe from rodents.
农民用一个老鼠守卫来保护他的庄稼免受啮齿动物的侵害。
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3.The ratguard was a crucial part of the security system in the old castle.
这个老鼠守卫是老城堡安全系统的重要组成部分。