| 单词 | lifeblood |
| 释义 | life·bloodBrE /ˈlaɪfblʌd/ NAmE /ˈlaɪfblʌd/ noun [U ]~ (of sth )the thing that keeps sth strong and healthy and is necessary for successful development （事物的）命脉；生命线；命根子◆ Tourism is the lifeblood of the city . 旅游业是这座城市的命脉。(literary ) a person's blood , when it is thought of as the thing that is necessary for life （人的）命脉；生命必需的血液 |
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