"Set to 30" 是指将某个数值设定为30。这个短语来自英语中的动词 "set" 和数字 "30"。
例句：
Please set the temperature to 30 degrees. (请将温度设置为30度。)
Can you set the timer to 30 minutes? (你能将定时器设置为30分钟吗？)
I need to set the volume to 30% before I start the video. (在我开始视频之前，我需要将音量设置为30%。)
例句：
Please set the temperature to 30 degrees. (请将温度设置为30度。)
Can you set the timer to 30 minutes? (你能将定时器设置为30分钟吗？)
I need to set the volume to 30% before I start the video. (在我开始视频之前，我需要将音量设置为30%。)