声音简介
2.maintenance noun. 维持; 维护;保养In the future the machines will need spare parts and maintenance. 这些机器将来会需要备件和维修保养。Small gardens can be high maintenance. 小花园可能需要耗费很多精神打理。
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What matters more? Heath or power?What matters is to have power over the maintenance of our own health.