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汉语拼音：biān cái

居于形成层和心材之间的木材外部，比心材更易渗透，不如心材耐久，通常颜色比它最后变成的心材为浅。

1. 治理边疆的人才。

   明 余继登 《典故纪闻》卷十七：“臣观朝廷近日以边材为急，而诸臣所举有不尽然者。” 明 沉德符 《野获编·兵部·文士论兵》：“今上初年，如 冯仰芹 、 于完朴 二大参，俱真正边材，惜乎不及大用。” 清 丘逢甲 《送潮州诸孝廉公车北上》诗：“万言制策魁多士，一代边材起本兵。”

2. 木材外围色泽较淡的部分。

• In the tree crown, the basal area growth of trunk sapwood is approximately equivalent to that of the upper branch sapwood.

  在树冠内，树干边材断面积生长量与其上部的枝条边材断面积生长量大致相等。

• Sap stain, decay and molds can all develop in lumber as it waits to be dried or under drying conditions.

  当木材存放待干或处于某种干燥条件下，均能发生边材变色、腐朽和腐变。

• the side is in light color, which is called sapwood.

  在边部，颜色较浅，称边材。

• In older stems, only the most recent rings of xylem participate in the transport of materials. These make up the sapwood.

  在老茎中，仅最新的木质部环参与物质的运输。这些木质部环组成边材。

• The wood varies in colour from a flesh shade to a light reddish-brown with little distinction between heartwood and sapwood.

  木材颜色从肉色到淡红褐色不等，边材和心材区别很小。

• The sapwood of most species is more susceptible to fungal attack than the heartwood with its higher extractive content.

  大多数树种的边材要比含有教高抽提物含量的心材更易受真菌的侵害。

• The sapwood is yellowish with a hard and heavy heartwood .

  边材微黄色，心材坚硬而且沉重。

• Sapwood and heartwood are not well demarcated, although the sapwood alters faster than the heartwood.

  边材和心材没有得到很好划分，虽然改变的速度比边材心材。

• to strip the bark and sapwood from each stave (what the bugs love), and seal the back with several coats of shellac.

  或你能使用一个刮刀脱衣来自每个做木桶的木板（什么疯狂的爱）的吠声和边材，而且用虫漆的一些外套封闭背面。