血友病是一种罕见的血液疾病，遗传这种病的人极少或没有凝血因子，这些正是一种控制出血的蛋白质。
Hemophilia is a rare blood disorder, and people born with this condition have little or no clotting factor, a protein that controls bleeding.
这些致病因子使大肠杆菌可以定居于呼吸道或消化道黏膜，大量繁殖并侵入血液循环系统，引起各种疾病的发生。
These virulence factors enable E. coli can be settled in the respiratory or gastrointestinal mucosa, multiply and invade the blood circulatory system, causing various diseases.
但如果我不幸50岁的时候死了，极大可能是死于血液循环疾病、癌症、传染病或意外事故。
If I do happen to die at 50, it'll most likely be from circulatory problems, cancer, infection or external causes.
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