The barman beamed a warm smile at her.

酒吧侍者对她热情地微笑。

《牛津词典》

A warm smile is always on her face.

她的脸上总是挂着温暖的微笑。

youdao

I turned around and found an old lady with a warm smile.

我转过身，发现是一位面带温暖笑容的老太太。

youdao

With a warm smile, she plays hostess, serving tea she brings from the kitchen.

CNN: Saving Aesha

One little boy in blue pyjamas and sandals gave us a warm smile, through chattering teeth.

BBC: Syrian refugees endure plunging temperatures

Then Asma al-Assad "flashed a warm smile and deftly flicked" the reporter away.

CNN: Will Asma al-Assad take a stand or stand by her man?