Countersigning
v. <术>连署, 副署, 会签 （文件）( countersign的现在分词 )
✅ 同义词
🗣️ 情景例句
but I think I can be of some help to you.
但我觉得我可以对你略有帮助。
Why so pissed off? Someone got in your way?
干嘛发火，谁惹你啦?
it must be known to any kind of radio astronomer in the universe.
这个频率是宇宙中任何射电天文学家都应该熟悉的。