form
9 Derivatives
1
formal
2
former
3
inform
4
informal
5
performance
6
reform
7
reform and opening-up
8
transform
9
uniform
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form
词根组
9 词汇
已掌握 0
0
formal
1
former
2
inform
3
informal
4
performance
5
reform
6
reform and opening-up
7
transform
8
uniform