名词
中文翻译：Unknown
同义词：
['target return', 'target reflection']
例句：
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1. The sound of the gunshot echoed through the forest.
枪声在森林中回荡。
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2. The target was a small boat that had been hit by a torpedo.
靶子是一个被鱼雷击中的小艇。
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3. The echo of the waves could be heard from the shore.
海浪的回声可以从岸边听到。