Rcaf
abbr. 加拿大皇家空军（Royal Canadian Air Force）
🗣️ 情景例句
and he doesn't know anything
而他毫无所知
I think it's going to be too short.
我认为它将太短。
Police are wary of itinerants who cannot be traced to a recognized camp boundary or to four walls.
警察则对那些查不出有固定营地或住处的游荡者保持警惕。