Foldbacks
(foldback 的复数) 返送（系统）, 监听（系统）
🗣️ 情景例句
It's almost lunchtime, and no fish yet.
差不多到午餐时间了， 还没钓到鱼。
No news is good news.
没有消息就是好消息。
with their fellow scientists either in other countries or in universities,
和其他国家、其他大学同行们