试试 HanyuGuide 的主动间隔重复系统。
开始 7 天免费试用 · US$49.99 / 年
mourning staff draped in white, held at a funeral to show filial piety
long face; miserable look
to pull a long face
to cry; to weep
mourning
to lose sth abstract but important (courage, authority, one's life etc)