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1.spinal cord n.脊髓
例句:One patient I knew became totally paralyzed overnight from a spinal cord infection.
我知道的一个病人因为脊髓感染，一夜之间全身瘫痪。
2.stem cell n.干细胞
例句:Each mass turned out to have emerged from a single stem cell,which in turn generated
new blood cells.
每个细胞圈都是从一个干细胞发育而来，这些干细胞反过来产生新的血液细胞。
3.heart attack n.心力衰竭，心脏病发作
例句:The world economy survived the heart attack in the financial system.
世界经济从金融体系的心脏病中生还了下来。
4.replace with 用…代替
例句:Replace with your own version of this: at acme dynamite, I partnered with engineering to cut our product cost in half
可以用自己的版本取代为：在上一家公司我参与的工程中使我们产品成本降低了一半。
