be in black and white
以黑白方式表達(dá)或記錄，即以書面或正式的方式表達(dá)
書面語·強(qiáng)調(diào)書面證據(jù)或明確條款
英文釋義
to be clearly and definitively stated or documented
例句
Make sure the terms are in black and white before you sign the contract.
典故來源
源自印刷時(shí)代，文字以黑白墨水呈現(xiàn)，象征正式、明確且不可否認(rèn)的記錄。