Ron gave her a knowing smile.

罗恩向她报以一个会意的微笑。

《柯林斯英汉双解大词典》

When asked who sent them just give a knowing smile.

当人家问你是谁送的时，只要回以一个会意的微笑。

youdao

"You'll find out on Valentine's Day." he said with a knowing smile.

“到情人节那天你就会知道了。”他笑着说。

youdao

"You'll find out on Valentine's Day." he said with a knowing smile.

“到情人节那天你就会知道了。”他笑着说。

youdao