单词学习：from time to time 短语/副词短语
from time to time
/frəm taɪm tə taɪm/
偶尔；有时；间或
From time to time, Mr. Gu would organize a review session to help us consolidate what we had learned.
顾老师偶尔会组织一次复习课，帮助我们巩固所学知识。
单词卡片
卡片已就绪
