名词
中文翻译：调制上升
同义词：
['modulation', 'frequency rise']
例句：
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1. The signal was modulated to increase its strength.
信号被调制以增强其强度。
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2. The radio station's frequency has been rising steadily since the new year.
自新年以来，该电台的频率一直在稳步上升。
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3. The engineer monitored the frequency rise during the testing phase.
工程师在测试阶段监测了频率的上升。