once in a while
偶爾發生但不常發生
寫作用途
happen occasionally but not often
Once in a while, Grandpa leaves a note inside my lunchbox.
偶爾,爺爺會在我的午餐盒裡留一張紙條。
寫作技巧
Once in a while marks low frequency. It can appear at the beginning or end of a clause, and it is less regular than every week or every month.