1·Thromboembolism occurs when a blood clot (from a deep vein thrombosis) in a leg vein breaks off and travels through the body to the lungs where it becomes lodged and blocks blood flow.
当下肢静脉中的血凝块（来自深静脉血栓形成）脱落并通过身体移动到肺部，在那里沉积和阻塞血流时，就发生血栓栓塞。
2·Walters didn't know it at the time, but a blood clot in the fleshy innards of his skull would change his life — for the better.
当时，沃尔特斯并不知道，他头颅里的一个肉质血凝块会改变自己的生活，使它向好的方向转变。
3·This is due to a stagnation of blood in the veins caused by prolonged immobility, which can promote blood clot formation in veins.
其原因是由于长时间不动，造成静脉血液停滞，促使静脉中血凝块形成。
4·If part of the clot breaks up and travels through the vein to the lungs, it can be fatal.
如果部分血凝块碎裂并通过静脉流通到肺部，这将是致命的。
5·This is a ruptured tubal ectopic pregnancy. Note the twin fetuses at the lower right adjacent to the blood clot at the left.
图示输卵管妊娠破裂，图左可见双胞胎胎儿，紧邻破例处的血凝块。