先例

precedent
不乏～。There is no lack of precedents for this(in this connection)./开创～set (or create,establish)a precedent/违背～violate (or contradict) a precedent/援引～ invoke a precedent/有～可循have a precedent to go by/遵循～follow a precedent

• sage
• saggy
• salacious
• salient
• saliferous
• saliva
• sallow
• sallow
• salmon
• salubrious
• salutary
• salutation
• salvage
• salvation
• salve
• sanatorium
• sanctimonious
• sanction
• sanctuary
• sanctum
• sangfroid
• sanguine
• sanitation
• sanity
• sap