Ook
abbr. 通断键控；开关键控（On-Off Keying）
🗣️ 情景例句
A watch! I've got just the place for watches! Let's go.
手表！我正好知道有家卖表的。走吧！
This part of the country is very hilly.
这个国家这一部分有很多丘陵。
Since that time, various types of hovercraft have appeared and taken up regular service.
从那以后，各种各样的气垫船出现了，并开始了定期航行服务。