名词
中文翻译：警戒哨
同义词：
['alert post', 'sentry post', 'lookout point']
例句：
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1. The soldiers posted a guard at the border to prevent any trespassers.
士兵们在边境处设立了一个岗哨以防止任何入侵者。
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2. The policeman stood by the roadside as an alert post, ready to intervene if needed.
警察站在路边作为警戒点，随时准备介入。
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3. The old man sat on the bench outside the hospital, watching for any suspicious activity.
老人坐在医院外的长椅上，观察任何可疑的活动。