名词
中文翻译：狭窄的
同义词：
['narrow', 'narrow-band', 'narrow-band radio', 'narrow-band transmission']
例句：
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1. The narrow band of sunlight filtered through the trees.
阳光通过树梢，形成了一条狭窄的光带。
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2. This narrow-band signal is easily blocked by interference.
这种窄带信号容易被干扰所屏蔽。
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3. The narrow-band radio was used for long-distance communication during World War II.
二战期间，这种窄带电台被用来进行远距离通信。