now and then

基本解释

This section of the road is so norrow that there are bound to be traffic jams now and then.
这段路太窄，交通有时不免堵塞。
《新英汉大辞典》
If they are being honest, they will tell you they barely have the time, energy, and budget to help much beyond a pat on the back now and then.
如果他们说实话，就会告诉你除了偶尔在你背上拍一下表示赞许外，他们几乎没有支持实现新思想的时间、精力和预算。
Besides that, our parents let us e-mail sometimes, and we still get to talk and crack up together on the phone now and then.
除了这个之外，有时，我们的父母还让我们互相发邮件，我们时常通过电话彼此交谈，一起哈哈大笑！

Now and then the princess had seen her looking at and talking to the young man.
Every now and then you read in the newspaper about somebody whose parachute failed to open and so they died.
不时地你会在报纸上看到,某人的降落伞没打开导致他们死了。
耶鲁公开课 - 死亡课程节选
but I like to, every now and then, I take a walk over there, just cut through Central Park
我喜欢时不时地穿过中央公园，到河滨公园散步，
我的爱好是读书 - SpeakingMax英语口语达人

Sure, I buy ebooks for my Kindle every now and then, but I want the bookstore!
FORBES: E-Reader Maker Kobo Responds To Borders' Liquidation News