他随身携带了无线电设备，以便在紧急情况下呼叫经过这里的飞行员，但最终发现设备根本不起做用。
He carried a radio so he could call commercial airline pilots to relay messages in case of emergency, but he discovered that it wasn't working.
他随身携带了无线电设备，以便在紧急情况下呼叫经过这里的飞行员，但最终发现设备根本不起做用。
He carried a radio so he could call commercial airline pilots to relay messages in case of emergency, but he discovered that it wasn't working.
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