finishing touch

US /ˈfɪn.ɪʃ.ɪŋ tʌtʃ/
UK /ˈfɪn.ɪʃ.ɪŋ tʌtʃ/
"finishing touch" picture
1.

點睛之筆, 畫龍點睛

a final detail or improvement that completes or perfects something

:
Adding the small decorative vase was the perfect finishing touch to the room.
加上那個小裝飾花瓶是房間完美的點睛之筆
The artist added a few more brushstrokes as a finishing touch to the painting.
藝術家又添了幾筆,作為畫作的點睛之筆