名词短语
中文翻译：可变深度声纳
同义词：
['variable-depth sonar', 'variable-depth sonar system']
例句：
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1. The variable-depth sonar is used to detect underwater objects.
可变深度声纳用于探测水下物体。
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2.The variable-depth sonar system can be used for underwater exploration.
可变深度声纳系统可用于水下探索。
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3.The variable-depth sonar was developed to improve detection accuracy in deep waters.
可变深度声纳被开发出来，以提高深水探测的准确性。