发出信号 (fāchū xìnhào, send a signal)
Grammar & Usage
How it works
This is a V-O (verb-object) construction. 发出 (fāchū) means 'to send out' or 'to issue', and 信号 (xìnhào) means 'signal'. Together, they form a common verb phrase indicating the action of transmitting a signal, which can be literal (e.g., radio waves) or figurative (e.g., a warning sign).
Sample sentences
灯塔每隔几秒钟就会发出信号，指引船只方向。
The lighthouse sends out signals every few seconds to guide the ships.
公司向市场发出信号，表明他们对未来充满信心。
The company sent a signal to the market, indicating their confidence in the future.
当探测器检测到异常时，它会自动发出信号。
When the detector detects an anomaly, it will automatically send out a signal.
Mnemonic
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Example
灯塔每隔几秒钟就会发出信号，指引船只方向。
The lighthouse sends out signals every few seconds to guide the ships.
公司向市场发出信号，表明他们对未来充满信心。
The company sent a signal to the market, indicating their confidence in the future.
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