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Na-Ca exchange system =========================== ・ 交換 : [こうかん] 1. (n,vs) exchange 2. interchange 3. switching 4. reciprocity 5. barter 6. substitution 7. replacement 8. clearing (of checks, cheques) ・ 系 : [けい] 1. (n,n-suf) (1) system 2. lineage 3. group 4. (2) type of person 5. (3) environment 6. (4) medical department (suf) スポンサード リンク
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