欧洲的交流电输出频率通常为50赫兹。In Europe, AC is usually generated at 50 Hz.你可在短波37.5赫兹上收到我们的节目.You can receive our program at short wave 37.5 MH.频率用赫兹即每秒钟的周数来计算.Frequency is measured in hertz, or cycles per second....
“把那个穿紫衬衫的家伙叫过来。”——“好的，老兄。”"Get the guy in the purple shirt." — "All right, my man."只要她拒绝他，他就会把她打得青一块紫一块。Whenever she refused, he'd beat her black and blue.略微发紫的大朵蓝花在6月初绽放。The large, purplish blue flowers appear in e...