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VERB
開顏；露出喜色；快樂起來
If someone brightens or their face brightens, they suddenly look happier.
例句
Seeing him, she seemed to brighten a little...
看到他后，她似乎露出點兒喜色。
'Oh, we'd love to!' cried Nancy, her face brightening.
“哦，我們很樂意！”南希面露喜色，大聲說道。
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VERB
（眼睛）發亮，放光
If your eyes brighten, you suddenly look interested or excited.
例句
His eyes brightened and he laughed...
他眼睛一亮，笑了起來
Her tearful eyes brightened with interest.
她含著淚水的雙眼因為好奇而閃閃發亮。
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VERB
使生色；為…增輝添彩
If someone or something brightens a place, they make it more colourful and attractive.
例句
Tubs planted with wallflowers brightened the area outside the door.
桂竹香盆栽為門外的景致增色不少。
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V-ERG
（使）好轉；（使）變得樂觀
If someone or something brightens a situation or the situation brightens, it becomes more pleasant, enjoyable, or favourable.
例句
That does not do much to brighten the prospects of kids in the city...
那并不能使城里孩子們的前途更光明些。
It is undeniable that the economic picture is brightening.
不可否認經濟狀況正在好轉。
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V-ERG
照亮；（使）變明亮
When a light brightens a place or when a place brightens, it becomes brighter or lighter.
例句
The sky above the ridge of mountains brightened...
山脊上方的天空變得明亮起來。
The late afternoon sun brightened the interior of the church.
傍晚的太陽照亮了教堂內部。
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VERB
（天氣）放晴
If the weather brightens, it becomes less cloudy or rainy, and the sun starts to shine.
例句
By early afternoon the weather had brightened.
中午剛過，天就放晴了。