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
But Christmas is the most important holiday of the year.
但是圣诞节是一年当中最重要的节日。
Have you send him any pencils?
你送他铅笔吗？
What's wrong, Jim?
怎么了？吉姆？