Collineation
直射（变换）, 同射变换
🗣️ 情景例句
Where can I find the information desk?
咨询台在哪儿？
It's pleasure to meet you.
幸会，幸会。
On the way home, he asked Jenny if she had enjoyed the speech.
在回家的路上，他问珍妮是否喜欢他的祝词。