英汉例句雙語例句A specialized parenchyma cell, located in the phloem of flowering plants and closely associated in development and function with a sieve-tube element.一種特殊的軟組織細胞，位於開花植物的靭皮部，生長和功能與篩琯要素密切聯系。词组短语短語sieve -tube element 篩琯分子