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在过去十几年里，全球人工心脏的技术演进经历了第一代机械接触轴承、第二代液力悬浮，最终走向了目前公认的形态——第三代“全磁悬浮”。
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Zapparoli said getting people into "good habits" before they reach 50 would mean "in 30 years time we won't have the same need in the general population as we do now".
The Northampton fly-half sat out training on Monday because of illness but England have been quick to allay fears that his participation against Italy is in doubt. Provided he recovers, Smith is expected to start at fly-half in place of George Ford.