当他们在听到警报赶去救火时，当他们从事故现场回来时，当他们进行包括训练在内的体力活动时，心脏病发作的风险就会增加。
Risk of heart attack is increased for firefighters when they respond to an alarm, return from an incident, or engage in physical activity, including training.
当他们在听到警报赶去救火时，当他们从事故现场回来时，当他们进行包括训练在内的体力活动时，心脏病发作的风险就会增加。
Risk of heart attack is increased for firefighters when they respond to an alarm, return from an incident, or engage in physical activity, including training.
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