Orthocomplementation
正交补
🗣️ 情景例句
It does sound tempting.
听起来很诱人。
You haven't been around much lately,have you?
你近来不大出来走动了，是吧？
I like writing to my penfriend, but it takes a lot of time.
我喜欢给笔友写信，但那很花时间。