劍橋詞典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 （表示松一口氣、疲倦或覺得熱）??！??！唉！ Phew! I'm so glad I don't have to give that speech . 啊！我不必發(fā)表演講了，真開心。 Phew, it's boiling in here! 唷，這里真熱！ 返回 phew!