A third factor is damage to the endothelial cell lining of a blood vessel which exposes tissue factor and collagen.

第三个因素是血管壁的损伤，这使得组织因子和胶原得以暴露。

The first way is called the extrinsic pathway, which starts when tissue factor gets exposed by the injury of the endothelium.

第一种是外源性凝血途径由组织因子暴露于血管壁损伤处后启动。

Procoagulants could be proteins like tissue factor or bacterial components like lipopolysaccharide, or could even be the presence of enzymes that help to proteolytically cleave and activate clotting factors.

促凝因子可以是类似组织因子的蛋白质，或者类似脂多糖的细菌成分，甚至可以是帮助蛋白酶切割和活化凝血因子的酶。

Tissue factor turns inactive factor VII into activate factor VIIa (a for active), and then tissue factor goes on to bind the newly formed factor VIIa to form a complex that turns factor X into active factor Xa.

组织因子使无活性的因子VII转变为活性因子VIIa，之后组织因子结合新形成的因子VIIa，形成一个复合物将因子X转变为活性因子Xa。

After that, some platelets adhere to the damaged vessel wall, and become activated by collagen and tissue factor, proteins which are normally kept separated from the blood by an intact endothelium.

接着，血小板粘附至损伤的血管壁，并且被胶原和组织因子活化；这些蛋白质平常由完好的血管壁与血液隔离。