以下为句子列表:
英文: Centripetal xylem differentiates from the outside toward the center, and a centripetal inflorescence (e.g. the capitulum) is one in which the outer flowers open before those in the center.
中文: 向心的木质部的分化是从外向内的,向心式的花序(头状花序)是外面的花比中央的花先开放。
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