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root cause▼◼◼◼noun[UK: ruːt kɔːz] [US: ˈruːt ˈkəz]
polygon of forces▼noun[UK: ˈpɒ.lɪ.ɡən əv ˈfɔː.sɪz] [US: ˈpɑː.lɪ.ˌɡɑːn əv ˈfɔːr.səz]
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