He smiled knowingly.

他会意地笑了。

《柯林斯英汉双解大词典》

And he smiled knowingly.

他会意地微笑着。

youdao

While he spoke to us, we simply nodded knowingly and smiled.

他说的时候，我们只是不停地笑着点头。

youdao

Placing his right hand knowingly on her shoulder, the jeweler then reached out to touch her small face with his left hand, his eyes never leaving hers as he smiled sincerely and deeply into them.

熟悉安置他的右手在她的肩膀，珠宝商然后提供援助接触她的小面孔与他的左手，他的眼睛从未离开她的当他恳切地和深深地微笑入他们。

youdao

Placing his right hand knowingly on her shoulder, the jeweler then reached out to touch her small face with his left hand, his eyes never leaving hers as he smiled sincerely and deeply into them.

熟悉安置他的右手在她的肩膀，珠宝商然后提供援助接触她的小面孔与他的左手，他的眼睛从未离开她的当他恳切地和深深地微笑入他们。

youdao