剑桥词典used when you are happy that something difficult or dangerous has finished or is not going to happen , or when you are tired or hot （表示松一口气、疲倦或觉得热）啊！唷！唉！ Phew! I'm so glad I don't have to give that speech . 啊！我不必发表演讲了，真开心。 Phew, it's boiling in here! 唷，这里真热！ 返回 phew!