Another warning sign of a medical emergency is difficulty breathing. This could mean a heart condition. Or there could be a hole or a blockage in a lung.
另一个急救的警告信号是呼吸困难。这可能是心脏的问题，或者可能是肺部有孔或是堵塞。
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Another warning sign of medical emergency is difficulty breathing. This could be mean a heart condition or there could be a hole or blockage in the lung.