The airport did not become operational until May.
机场到五月才可使用。
The Global Management System will become operational this year.
全球管理系统将在今年开始运转。
After this step is complete, the WSRR nodes will become operational within the message flow.
完成此步骤以后，WSRR节点将在消息流中变得可操作。
Only in recent years, though, have they become fully operational and more capable.
只是在最近几年，它们才能被完全操控并且更有能力。
Emission control systems take longer to warm up and become fully operational in cold weather.
冷天时，排放控制系统需要花费较长时间预热，才能全效工作。
Emission control systems take longer to warm up and become fully operational in cold weather.
冷天时，排放控制系统需要花费较长时间预热，才能全效工作。
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