Photovalve
光電發射管, 光發射元件
??? 情景例句
The office network is running again, we can finally get some work done.
辦公室的網絡又聯上了，我們終于可以做些事情了。
The accident held the train up for an hour.
那事故使火車延誤了一個小時。
Please give us your proposal if you're ready for that.
如果你們愿意做合資經營，請提出你的方案。