upkeep operation

基本解释

Efficiency is high , usage cost is low , operation upkeep is simple , operation is reliable.
傚率高、使用成本低、操作維護簡單，運行可靠。
Several companies and organizations contribute to its upkeep and operation. But no one owns the Internet, since anyone with access to a computer can create Web content.
一些公司和組織捐款資助其維持和運營。但沒有人對互聯網擁有所有權，因爲通過一台計算機上網的人可創建網絡內容。
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At all times , the primary responsibility of the engineer officer in charge of watch should be safe and efficient operation and upkeep of machinery affecting the safety of the ship .
在任何時候，負責值班的輪機員的主要職責都應是對影響船舶安全的機械設備進行安全有傚的使用和保養。