专业英语翻译,求人工

1 Wood
Wood is the oldest of the structural materials. It has been used since prehistoric times. Wood
can be shaped with simple tools, and it can be easily fastened with nails, screws, or adhesives. It is
available either as lumber, which is a natural wood, or as glued laminated timber. This latter form
is much stronger and consists of specially selected and prepared wood laminations securely
bonded together with glue or adhesives. The laminations do not exceed in thickness. Glued
laminated beams are available in a variety of shapes. Both lumber and glued timber is widely in
building construction.
Wood contains certain natural defects, such as knots, shakes, etc., which require that it be
stress-traded to establish design or allowable stress values for particular members. Another
important factor is the grain of the wood .The allowable stress in compression parallel to the grain,
for instance, is higher than the allowable stress perpendicular to the grain.

Wood is the oldest of the structural materials. It has been used since prehistoric times. Wood can be shaped with simple tools, and it can be easily fastened with nails, screws, or adhesives. It is available either as lumber, which is a natural wood, or as glued laminated timber. This latter formis much stronger and consists of specially selected and prepared wood laminations securely bonded together with glue or adhesives. The laminations do not exceed in thickness. Glued laminated beams are available in a variety of shapes. Both lumber and glued timber is widely inbuilding construction.Wood contains certain natural defects, such as knots, shakes, etc., which require that it be stress-traded to establish design or allowable stress values for particular members. Another important factor is the grain of the wood .The allowable stress in compression parallel to the grain,for instance, is higher than the allowable stress perpendicular to the grain.
木材是最古老的结构材料。自史前时代已经过去。形成的木材可以用简单的工具,它可以轻松的紧固螺钉,钉,或粘合剂。它可以作为木材,这是一种天然的木材,或胶合木。这后一种方式更强大的和由特别挑选和准备的木材牢固地粘结在一起的叠片胶或粘合剂。叠层的厚度不超过。胶合层积梁在各种形状可供选择。无论是木材、胶合木材广泛中建设。木材有一定的天然缺陷,如结,摇摇头,等,这要求它应力交易来建立特定的成员或容许应力设计值。另一个重要的因素是木头的纹理。许用应力在顺纹压缩,例如,高于垂直于晶粒的许用应力。
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第1个回答  2014-04-08
1木材
木材是结构材料的最老的。它史前的时代以来就已经被用。木材
能与简单的工具一起成形,它能容易地与钉子、螺丝钉或黏性物一起拴紧。它是
可得的或当做是天然的木材的木材,或当做黏叠片木材。这较后者的形式
非常强壮而且有安全地特别地选择而且准备木材制成薄板
以债券作保证的连同胶或黏性物一起。制成薄板没有在厚度超过。黏
叠片光线在多种形状中是可得的。两者的木材而且广泛地黏木材是在
建筑物工程。
木材包含需要的特定的天然缺点,像是结、摇动,等等,它是
压迫力-交易建立特别的成员的设计或可允许的压迫力价值。另外一
重要的因素是木材的谷粒。在压缩平行中的可允许的压迫力对谷粒,
举例来说,对谷粒比可允许的压迫力垂直线高。
第2个回答  2014-04-08

木材是最古老的结构材料。自史前时代它已被使用。木
可以成形用简单的工具,它可以容易地紧固用钉子,螺钉或粘合剂。这是
可无论是作为木材,这是一种天然木材,或胶合层积材。这后一种形式
强得多,由特别挑选和准备木材安全叠片
用胶水或粘合剂粘合在一起。叠片不厚度超过。胶合
叠层梁,可在各种形状。这两种木材和胶合材是在广泛
建筑施工。
木材含有一定的天然缺陷,如结,奶昔等,这要求它是
应激交易到建立特定成员或设计许用应力值。另一
重要的因素是木纹,在平行于晶粒压缩的许用应力,
举例来说,比垂直于晶粒的许用应力更高。本回答被提问者和网友采纳
第3个回答  2014-04-08
你去用英语软件一个一个单词查
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