Rcs
abbr. 雷达横截面（Radar Cross-Section）；皇家外科医生协会（Royal College of Surgeons）
🗣️ 情景例句
A young male may be addressed as 'young man'.
一个年轻的男性可以被称作 'young man' 。
I'm sorry. I thought you wouldn't mind.
对不起，我还以为你不在乎呢。
This is not easy, and may require two porpoises working together.
这并非易事，可能需要两只海豚合伙干才行。