once in a while造句

"Once in a while, we eat out." 我們偶爾下館子吃飯。

"He goes to see them once in a while." 他偶爾去探望他們。

"Every once in a while, upstairs makes a strange noise at night." 每隔一段時間，晚上樓上就會發出奇怪的聲音。