The amplitude of the vibration determines the loudness of the sound.振动幅度的大小决定声音的大小.The students began to enter the classroom and Anna was startled at their loudness.学生们开始进入教室.安娜被他们的喧闹声吓了一跳.His heart bumped in his breast ...
The pass mark is set at 50 per cent.合格分数设定为百分制的50分。The heat dial was set at 150 degrees.温度调节器设定在150度。Their electricity is set at 0.25 yuan per light.他们的电费被定为每度2角5分....