Vocabulary consisting only from characters you are able to read
大国
taikoku
large country, major powersmix
投入
tounyuu
(1)throwing (e.g. something into somewhere), (2)investment, putting in (personnel, etc.), (3)release of a product, (4)making (an electrical circuit) suru
やり取り
yaritori
giving and taking/exchange (of letters)/arguing back and forth/(conversational) exchange/(P)jlpt3, suru