名词
中文翻译：瞭望台
同义词：
['lookout tower', 'lookout post', 'lookout station']
例句：
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1. The watchtower was built to keep an eye on the river.
瞭望塔是为了监视河流而建的。
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2. The soldiers stood at the watchtower, scanning the horizon for danger.
士兵们站在瞭望塔上，扫描着地平线寻找危险。
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3. The watchtower was a crucial spot for the early warning system.
瞭望塔是早期预警系统的关键位置。