day·book /-ˌbʊk/
  日記簿,交易日記帳
  Day·book n. A journal of accounts; a primary record book in which are recorded the debts and credits, or accounts of the day, in their order, and from which they are transferred to the journal.
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  daybook
       n 1: a ledger in which transactions have been recorded as they
            occurred [syn: journal]
       2: an accounting journal as a physical object; "he bought a new
          daybook" [syn: ledger]