Definition
Used to describe a situation that is becoming more complicated or mysterious.
用於表示情況突然變得更加複雜或神秘。
Just when we thought we had solved the problem, new evidence emerged, and the plot thickened.
就在我們以為已經解決了問題時，新的證據出現了，情節變得更加複雜。
She thought it was just a simple meeting, but she found that undercurrents were flowing among all parties, and the situation became increasingly complicated.
她以為這只是一場簡單的會議，但她發現各方之間暗流湧動，情況變得越來越複雜。
As more details were revealed, the plot of the case thickened.
隨著更多細節被揭露，案件的情節變得更加複雜。