材

The property difference of between the sap-and heartwood leads to the variation of mechanical properties of wood.

刺槐生长具有异速性，心、边材组成结构比例、密度、硬度的不同，形成了木材的机械性能的差异。

Many plants accumulate tannins, particularly in leaves, fruits, seed costs, bark, and heartwood.

许多植物都会积累鞣质，尤其是在叶片、果实、种皮、树皮和木材之中的心材之类的地方。

In the heartwood of the old trunks, there is ample oak tannin and aromatic materials of oak, which ensures the quality of the oak products.

这种老树干的心材中，含有丰富的橡木单宁和橡木的芳香物质，是保证橡木制品质量的关键所在。

Small genus of tropical African timber trees having pale golden heartwood uniformly striped with dark brown or black:.

有苍白金黄的心材并均一带有棕黄或黑色的条纹的热带美国木材乔木的小属。

Meanwhile, for economizing energy, the heat insulation material with good quality becomes the inevitable choice too.

同时，从节约能源的角度出发，质量良好的隔热材也逐渐成为行业的必然选择。

Warm preservation for pipes, heat insulation and water proof material of roofs.

管道保温、屋顶隔热防水卷材；2、旅游垫、沙滩垫、野营防潮垫等

Both of them have used the implication of helix as the creative theme, which is expressed with new media technology and material.

然而两人的表现形式，却都利用新的媒体技术和媒材来表现。

The small waves were the same, chucking the rowboat under the chin as we fished at anchor, and the boat was the same boat, the same color green and ribs broken in the same places, and the under the floor-boards the same fresh-water leavings and debris--the same hellgrammite, the wisps of moss, the rusty discarded fishhook, and the dried blood from yesterday's catch.

水波还是一样的水波，在我们抛锚钓鱼时一样地轻拍船头底部，船也还是一样的船，一样的绿色，肋材坏在一样的地方，底板一样的淡水残积物------鱼蛉的尸体，撮撮青苔，锈迹般般的废弃鱼钩，以往钓鱼干了的血迹。

Using Hemerocallis middendorfii 's 6 varieties as experimental materials, we the investigated effects of hormone combination, types of explants, genotype and culture media on rooting of adventitious shoot.

摘要以大花萱草的6个品种为试材，主要研究了其组织培养中的激素配比、外植体类型、基因型以及不定芽的生根条件。

The Company applied the import machinery, first-class production technology, specializing in the production of EPE foam tube, bar and various Hemming Profile Corner.

本公司应用进口机器，一流的生产技术，专业生产EPE发泡管，棒材及各种包边护角异型材。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。