upkeep operation

基本解释

Efficiency is high , usage cost is low , operation upkeep is simple , operation is reliable.
效率高、使用成本低、操作维护简单，运行可靠。
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.
一些公司和组织捐款资助其维持和运营。但没有人对互联网拥有所有权，因为通过一台计算机上网的人可创建网络内容。
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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 .
在任何时候，负责值班的轮机员的主要职责都应是对影响船舶安全的机械设备进行安全有效的使用和保养。