Ook
abbr. 通断键控；开关键控（On-Off Keying）
🗣️ 情景例句
What will the monthly payments be?
每月要付多少？
One hour's sleep before midnight is worth three after.
午夜前睡一小时抵得上午夜后睡三小时。
Thank you. Goodbye.
谢谢。再见。