七qī数（六加一后所得） seven:第七 seventh第十七 seventeenth七年 septenate; seven years乱七八糟 at sixes and sevens; in a mess十七 seventeen名（旧时人死后每隔七天祭一次，直到四十九天为止，共分七个“七”） a seventh day after death, when sacrifice is offered until seven times seven days (forty-ninth) is over:三七 the third seventh头七 the first seventh（姓氏） a surname:七希贤 Qi Xixian
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