collections [kə'lekʃənz]

以下由轻松背单词网站提供

附加级

n.收集( collection的名词复数 )；收藏品；作品集；募集的款项

There are two collections a day from this letter-box. 这个信筒每天收信两次。来自《简明英汉词典》
How many collections of letters are there every day? 每天收信几次？来自《现代汉英综合大词典》