同義字最困難之處在有些可互換，有些不能互換，除了對字義要有相當清楚的概念之外，還要不斷檢視實際語例，探究字詞用法，沒有適當的工具，就得耗費大量的心力
氣氛
1. aura
但前一站也同樣有熱不起來的氣氛。But there was a similarly listless ~ at the previous stop.
2. mood
氣氛很快變得凝重。
The ~ quickly turned grim. 他說會談氣氛良好。He said the ~ at the meeting was good.
3. ambience
氣氛要對。The ~ gotta be right.
4. atmosphere
敗選氣氛彌漫謝的競選總部。The ~ of defeat pervaded Hsie’s headquarters.
climate
恐懼的氣氛已經降臨校園。The climate of fear has settled over campus.
以上 1 2 34 的英文對應，依語境來說，只有第四項的atmosphere跟climate可互換
