I give it a polish now and again.

我不时把它擦亮。

《牛津词典》

I love listening to my friends talk and laugh, throwing in a zinger of my own now and again.

我喜欢听我好友说说笑笑，不时地插入几句我自己的巧言妙语。

《柯林斯英汉双解大词典》

Now and again, he disappeared only to reappear once more.

他时而消失，时而又出现。

youdao

He made a mistake now and again while performing this special duty.

VOA: special.2009.10.31

Now if they had taken another set of 446 anorexics, and again June was the month, then there would be some credibility in it.

现在如果他们选择另一组446位女性，然后同样做出六月的结论，这样可能就更可信了。

麻省理工公开课 - 计算机科学及编程导论课程节选

OK. Now, having done that, again I want to stress this idea and I'm going to write it out one more time, that there's a particular format here.

好，讲完了这些，我又想要强调一下这个思想,并且再一次把它写出来了，就是有一个特定的格式。

麻省理工公开课 - 计算机科学及编程导论课程节选

Ditto things like reporting, which would be intriguing to look out now and again.

FORBES: What Is It Like To Own A Nest Thermometer?

The grazing was parcelled out, rent received annually and now and again another field sold.

NEWYORKER: The Woman of the House

It's a silly penalty, a silly mistake now and again that has cost us.

BBC: James Hook happy to fill Wales full-back role