optical instruments such as microscopes and telescopes显微镜和望远镜等光学仪器Telescopes and microscopes are optical instruments.望远镜和显微镜是光学仪器.Telescopes and microscopes magnify.望远镜和显微镜能放大....
I wasn't able to sleep that night, I was so keyed up.那一夜我无法入睡,我太激动了。Brian keyed in his personal code.布赖恩键入了他的个人密码。She keyed her mood to that of the other guests.她控制情绪使之与其他客人一致....