He comes to our room for a chat every once in a while.

他偶尔来我们房中闲谈.

《现代汉英综合大词典》

Every once in a while, people step up - they rise above themselves.

时不时的, 人们就会进步 - 超越自身,更上一层楼.

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I watched things change and made observations every once in a while.

我观察着事物的变化,时不时地提出我的意见.

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Give gifts -- nice small gifts are appreciated every once in a while.

给对方送礼物 —— 偶尔送些甜蜜小礼物,就能令对方感激不尽.

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