名词
中文翻译：子公司信号
同义词：
['subordinate signal', "subsidiary signal例句：1. The company's subsidiary in Hong Kong is expanding its operations.（该公司在香港的子公司正在扩大其业务。）2. The subordinate signal was weak and unreliable.（次级信号弱且不可靠。）"]
例句：
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1. The company's subsidiary in Hong Kong is expanding its operations.
该公司在香港的子公司正在扩大其业务。
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2. The subordinate signal was weak and unreliable.
次级信号弱且不可靠。
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3. The engineer used the subordinate signal to guide the drone through the fog.
工程师使用次级信号引导无人机穿越雾区。