ROOT WORDS
作者：Giselle Sepúlveda Ruiz
1. PREFIXES
1.1. BI
1.1.1. BILINGUAL
1.1.2. BI-MONTHLY
2. Root:
2.1. Monolingual
2.1.1. Goal 1
2.1.2. Goal 2
2.2. Bilingual
2.2.1. Session Rule 1
2.2.2. Session Rule 2
1.1.1. BILINGUAL
1.1.2. BI-MONTHLY
2.1.1. Goal 1
2.1.2. Goal 2
2.2.1. Session Rule 1
2.2.2. Session Rule 2