卫冕理论说若她的肿瘤部分中断的，要么她的肺血管破裂，或造成了她的心脏的巨大的堵塞。

The reigning theory was that part of her tumor had broken off and either ruptured her pulmonary artery or created a huge blockage in her heart.

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训练过程中，心跳超过每分钟200次；乳酸在肌肉里聚集到酸痛的程度；肺里脆弱的毛细血管都会破裂。

As they train, hearts race at over 200 beats a minute; lactic acid builds to stinging levels in muscles; fragile capillaries burst in the lungs.

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