買賣的英語翻譯：

merchandise; marketing; bargain; buying and selling; trade; transaction
【經】 bargain; commercial act; commercial transaction; handle

契約的英語翻譯：

bargaining; bond; contract; covenant; deed; indent; indenture; obligation
pact; stipulation
【經】 agreement; agreements; bargain; compact; contract; deed; indenture
instrument; title deed