Craven was convinced that aspirin was preventing prothrombin, one of the factors in blood clotting.

克雷文确信阿司匹林可以预防酶原，酶原是固素之一。

Factor Xa, with Factor Va as a cofactor, turns factor II (also called prothrombin) into factor IIa or thrombin.

活性Xa和作为辅Va将II（酶原）转变为IIa（酶）。

Finally, an elevated or prolonged prothrombin time, which is the time it takes your blood to clot, is a typical lab finding in more severe cases.

最终，酶原时间延长，固时间，也是更严重自免肝病例典型实验室指标。

Diagnosis of hemophilia A and B usually starts with lab tests including a platelet count which is usually normal, a prothrombin (PT) time, and a partial thromboplastic (PTT) time.

友病A和B诊断通常是进行实验检测，包括小板计数（一般正常）、酶原时间（PT），以及部分活酶时间（PTT）。

There is also a prolonged prothrombin (or PT) time, as well as prolonged partial thromboplastin time (or PTT), both of which reflect having lower levels of circulating coagulation factors.

酶原（PT）时间和部分活酶（PTT）时间均会延长，两者都反映出循环中低水平。

Plasma is the liquid part of the blood and consists of water, dissolved proteins, sugar, salts, hormones, and other substances. The four major plasma proteins are albumin, globulin, fibrinogen, and prothrombin.

浆是体部分，由水，溶解蛋白质，糖，盐，激素和其他物质组成。四种主要浆蛋白是白蛋白，球蛋白，纤维蛋白原和酶原。