名词
中文翻译：水下完成
同义词：
['submersible completion', 'underwater construction', 'underwater project completion']
例句：
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1. The submersible was designed to complete the underwater survey in a matter of hours.
这种潜水器设计用来在几小时内完成水下勘测。
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2. The underwater project is expected to be completed within six months.
预计这个水下项目将在六个月内完成。
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3. The underwater project has been completed successfully.
这个水下项目已经成功完成了。