选择关卡 Word sets
Core parts have 15 words (Part A / Part B). Exam sets have 50. A set clears when 80% of its cards are in review with an interval of at least 1 day. Missed cards come back; they do not block the set. An uncleared set is a 12-minute challenge.
本组进度
挑战
12:00
0%
—
Set cleared!
Great work.
★★★
遗憾失败
时间到了。这组还没通关。错词会再出现,再试一次即可。