Rcaf
abbr. 加拿大皇家空军（Royal Canadian Air Force）
🗣️ 情景例句
Call the plumber to fix the toilet.
给水管工打个电话来修理厕所。
His argument doesn't hold water.
他的论点站不住脚。
It will be found that the weight moves but slightly or not at all.
结果会发现，重物是动了，但动得很小，甚至没动。