心脏和动脉疾病过早地结束了许多人的航海生涯，而且也是海员们的头号杀手。
Diseases of the heart and arteries end many seafaring careers early - and are the number one killer of seafarers while at sea.
地理大发现和大航海触发了疾病的大传播。
The great geographical discoveries and great navigations lead to great spread of diseases.
地理大发现和大航海触发了疾病的大传播。
The great geographical discoveries and great navigations lead to great spread of diseases.
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