73. Last year the influential trade show Designers Agents stopped charging its participation fee for young green entrepreneurs who attend its two springtime shows in Los Angeles and New York and gave special recognition to designers whose collections are at least 25% sustainable.

　　主干：the trade show Designers Agents stopped charging... and gave recognition to designers...

　　解析：1.主句的主語部分是兩個同位的名詞詞組，the influential trade show 和Designers Agents。主句的謂語動詞是and 并列連接的stopped 和gave。

　　2.第一個謂語動詞stopped 用動名詞短語charging...作賓語。該動名詞短語是charge fee for 結構。who引導的定語從句修飾entrepreneurs。

　　3.第二個謂語動詞是gave，用了give recognition to...結構。whose 引導的定語從句修飾designers。

　　譯文：去年，頗具影響力的貿易展Designers Agents 向參加洛杉磯和紐約兩次春展的年輕的倡導綠色設計的企業家們免收參展費，并且向那些設計的服裝至少使用了25%的有機布料的設計師們給予了特別的贊譽。