Strokes and heart attacks occur when blockages in the arteries supplying the brain or heart muscles cut off the supply of blood to tissues.

当供应大脑或心脏肌肉的动脉阻塞，进而切断组织血液供应时，就会出现中风和心脏病发作的情况。

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A deep wound, where the supply of blood and oxygen has been cut off, is the perfect place for certain kinds of bacteria to grow.

深的伤口是某些种类的细菌孽生的理想场所，因为那里的供血和供氧被切断。(译为原因状语从句)。

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In primitive stage, arteries and veins and lymphatic structure is not a difference, only after the formation in the supply of blood vessels artery, drainage vein and lymph vessels .

在原始阶段，动脉、静脉和淋巴管的结构是没有区别的，只有在以后才形成供应血管(动脉)，引流血管(静脉)和淋巴管。

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When a baby's head is stuck in the birth canal for an extended period of time, it cuts off the blood supply to the woman's surrounding organs.

VOA: special.2010.08.09

Patients undergoing long-term elective surgeries are advised to donate their own blood, a practice Dr.Mwanda says accounts for a significant percentage of the hospital's surgery blood supply.

VOA: standard.2010.06.04

Topping up the supply of healing fluid might be done by mimicking another biological system the network of blood capillaries that supplies living tissues with the stuff they need to thrive.

ECONOMIST: Monitor

Such skin absorption occurs in other mammals, and the leathery look of elephant skin is deceptive it actually has a rich blood supply.

ECONOMIST: Elementary elephant control