The contents of metal ions in sapwood are higher than those in heart wood.
结果发现在实验范围内，各种木材原料中都存在由多种金属离子构成的复杂体系；不同种原料中金属离子的含量和成分存在着很大差异；针叶木Ｆｅ、Ｍｎ 含量显著，高于阔叶木；同种原料中，边材金属离子含量一般高于心材；不同生长环境会导致木材金属离子分布出现差异。
The transformation of sapwood to heartwood is an important physiological process in most tree species.
以东北东部山区温带森林的7个主要组成树种——红松、兴安落叶松、春榆、水曲柳、胡桃楸、黄菠萝和蒙古栎为研究对象,比较分析各树种心材和边材的生长特征。
Experimental results showed that the sap flux density(SFD) of the middle sapwood was higher than the outer and inner;the daily SFDs of different sizes of trees diameter had similar pattern,the bigger trees had higher SFD than the smaller trees due to the difference in size of root system;the mean daily.
结果表明:加勒比松边材不同位点的液流密度由外到内呈低—高—低的态势;观测期间林分日液流密度变幅为411~4 120 L。
Guide edges: Edges of the sheet that is fed to the front and side guides respectively.The two guide edge of the sheet must be square.
纸规边:分别接触前纸规和侧纸规的纸边。纸的两 个纸规边要成直角。
Leading edge: The edge of a sheet or plate at which printing begins. Also called Gripper edge.
前纸边（纸头），前版边（版头）:纸张或印版，开始印刷的一边。亦称夹牙边。
The edges in contact with the air take up moisture and stretch. The uneven expansion between the edges and the centre, produce wavy edges.
纸边接角空气，吸收水份而伸长。纸边和纸中心的不平均膨胀，造成浪形纸边。参阅弓形纸边。
Gripper edge: Edge of a sheet to be gripped by the grippers of a printing machine.Also called Feed edge,Leading edge.
夹牙边:被印刷机上的夹牙抓牢的纸边。亦称前纸边，纸头。
Feed edge: Edge of a sheet presented to the lays of a press.Also called Gripper edge,Leading edge.
前纸边:送往印刷机上的标针的纸边。也成夹牙边，纸头。
Edge tearing resistance: Resistance of paper to develop an edge tear.
纸边抗撕度:纸张边缘对形成撕裂缺口的抗力。
Cockling: The puckered effect produced when printing sheets of paper having wavy or tight edges.
起皱: 用带有浪形纸边或弓形纸边的纸张施印，起皱情况就会发生。
Trim: (1) To cut off and square the edes of paper before printing.
裁边:(1)印刷前，把纸边裁切正文。
Lay edges: Edges of the sheet that is fed to the front and side lays respectively. The two lay edges of the sheet must be square. Also called Guide edges.
标针边:分别接触前标针和横标针的纸边。纸的两个标针边要成直角。亦称纸规边。
commercial continuous gravure printing machine
商用印纸边疆凹版印刷机(可用于印转移印花纸)
Margin waste suction inlet in lower suction method, computerized automatic positioning.
纸边废纸吸入口采下吸式.电脑自动定位.
edgewise compression strength
(纸板)边缘抗压强度
the newspaper and can of beer within reach.
边上放着报纸和啤酒罐。
The edges of the paper have been lapped over.
纸张的边缘被重叠起来。
Shout grain: Sheet of paper in which the grain is parallel to the short edge of the sheet.
短纹:纸张的纸纹和它的短边平行者，称短纹纸。
Long grain: Sheet of paper in which the grain direction (or machine direction) runs parallel with the longest side.
长纹:纸纹方向与纸的长边平行。
The small paper dancer danced by her paper house.
纸做的小舞蹈家在她的纸屋旁边跳舞。
Take a piece of cardboard or stiff paper and hold it close to the globe.
取一张纸板或硬纸片，拿到地球仪边。