Nkebi ahịrịokwu 1: A mụrụ Retzius na Stockholm, nwa onye na - amụ banyere ahụ mmadụ bụ́ Anders Jahan Retzius (na nwa nwa nke onye na - amụ banyere okike na kemist bụ́ Anders Retzius). Nkebi ahịrịokwu 2: A mụrụ Retzius na Stockholm, nwa onye na - amụ banyere ahụ mmadụ bụ́ Anders Jahan Retzius (na nwa nwa nke onye na - amụ banyere okike na kemist bụ́ Anders Retzius). Ajụjụ: Ọ̀ bụ otu ihe ka ahịrịokwu nke mbụ na nke abụọ pụtara? Ee ma ọ bụ Ee e?
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