你的血液细胞必须将营养传递给所有的其他细胞。
Your blood cells must deliver nutrients to all the other cells.
作家苏珊·尤因在《伟大的阿拉斯加自然概况》中写道，“鲑鱼从阿拉斯加涌出，就如同血液从心脏流出，给土地、动物和人类带来了节奏，传递了营养。”
"Salmon," notes writer Susan Ewing in The Great Alaska Nature Factbook, "pump through Alaska like blood through a heart, bringing rhythmic, circulating nourishment to land, animals and people".
两个动脉和一个静脉把胎儿与胎盘联结在一起，传递富含氧气和营养的血液，并把你的血液与婴儿自己的血液分离开。
Two arteries and one vein connect the fetus to the placenta, re-circulating oxygen-rich blood and nutrients and keeping your blood separate from your baby’s.
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