单词学习：every so often 短语/副词短语
every so often
/ˈɛvri soʊ ˈɔːfən/
偶尔，有时
Every so often, Mr. Gu takes a short break to clear his mind during long study sessions.
在长时间的学习中，顾老师偶尔会短暂休息一下，让头脑清醒。
单词卡片
卡片已就绪
