形容词
中文翻译：Unknown
同义词：
['quick', 'swift', 'swiftly']
例句：
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1. The car accelerated to a rapid speed on the highway.
汽车在高速公路上以快速的速度加速。
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2. The scientist conducted an experiment with rapid results.
科学家进行了一项实验，结果很快出来了。
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3. The team worked quickly to complete the project on time.
团队迅速工作，按时完成了项目。