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本
book; volume; script; this; present; current; in question; main; head; principal; real; genuine; regular; proper; counter for long cylindrical objects; counter for films, TV shows, etc.; counter for goals, home runs, etc.; counter for telephone callsnoun, prefix, counter
は
topic markergrammar
知識の泉
source of knowledge; fountain of knowledgenoun
だ。
plain copulagrammar