套的英語翻譯：

convention; copy; cover; formula; harness; knot; series; set; sheath; sleeve
suit
【化】 covering; set
【醫(yī)】 set

頭的英語翻譯：

beginning or end; cobbra; conk; crumpet; end; first; garret; hair; head
leading; nob; noddle; pate; sconce; side; top; twopenny
【醫(yī)】 capita; caput; cephal-; cephalo-; head; kephal-; kephalo-

交易的英語翻譯：

exchange; trade; bargain; deal; market; merchandise
【經】 bargain; bargaining; buy; deal; dealings; sales transaction; trade
trading