名词
中文翻译：瞭望塔
同义词：
['observatory', 'lookout tower', 'telescope station']
例句：
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1. The watchtower on the hill is a popular spot for hikers.
山丘上的瞭望塔是徒步旅行者的热门景点。
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2. The engineers were busy fixing the watchtower after the storm.
暴风雨过后，工程师们忙于修理瞭望塔。
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3.The watchtower was used as a communication hub during World War II.
二战期间，瞭望塔作为通信枢纽被使用。