为了报复，她砸了前任男友的家。She took revenge on her ex-boyfriend by smashing up his home.社区和教会领袖呼吁各方保持冷静,不要采取报复行动.Community and church leaders have appealed for calm and no retaliation.武装部队保持高度戒备，以防发生任何报复行动。The armed forces were on h...
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....
月球的引力the gravitational pull of the moon卫星被射入环绕月球的轨道.The satellite was launched into orbit around the moon.月球的石头和地球的不同.The lunar stone is different from earth's....