One or more layers of living and functional sapwood cells are periodically converted to heartwood.

每个生长周期都有一或多层活的边材细胞转变成心材.

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Heartwood is the mature wood, which is often darker, extending from the sapwood to the pith.

心材通常是成熟的木材部分, 通常色泽较暗, 范围从边材一直到髓心.

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Thecolor of sapwood of Chinese white poplar among trees has significant difference.

毛白杨边材材色株间存在显著差异.

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Sapwood pale colored with red vessel stripes.

边材色稍浅,仅导管槽带有红色.

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Sapwood contains xylem vessels, but not as strong as heartwood.

边材含有木质导管, 但不如中心木质那样坚硬.

辞典例句

We all know that the price of heartwood is higher than that of sapwood.

我们都知道,心材价格一向高于边材价格.

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Sapwood is the lighter colored wood growing from inside the bark to the heartwood.

边材色泽较浅,是从树皮到新材之间的木质部分.

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Heart sapwood distinction was not obvious, chestnut brown.

心边材区别不明显, 材色栗褐色.

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