phloem

常见例句

用作名词 (n.)

• In vascular plants, the xylem and phloem serve to translocate such substances.
  维管植物的木质部和韧皮部主要进行对这类物质进行运输。
• The secondary phloem consisted of sieve cells and phloem parenchymas.
  根的次生韧皮部则由筛胞和韧皮薄壁细胞组成。
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