试试 HanyuGuide 的主动间隔重复系统。
开始 7 天免费试用 · US$49.99 / 年
你今兒個應當 留守 。
例句数据由 Tatoeba.org提供。
detachment left to provide covering fire
\left-behind children\, rural children whose parents have to make a living as migrant workers in distant urban areas, but cannot afford to keep the family with them
to guard
to leave (a message etc)
