刺xin的刺刺儿
那个翻得不对,应该翻译为“Soil heavy metal pollution plant - microorganism combined processing technology principle and its Research Development”.我是北京大学外国语系的,请多指教。谢谢!
我还是杰
生物修复1选择金属耐性物,既能够耐受金属毒性,也能够适应干旱和极端贫瘠的基质条件,特别适用于稳定和改良矿业废弃地。在一定管理条件和水肥条件下,耐性植物能在废弃地上很好地生长,随着耐性植物对基质的逐渐改善,其他野生植物也逐渐侵入,最终可形成一个稳定的生态系统。金属富积植物能够在含不同重金属的基质上正常生长,在植物体内往往积累大量的重金属(1 000Ⅱlg/kg以上,干重),因此,可以通过反复的种植和刈割的方法,即可除去土壤中的大部分重金属,它特别适用于解除轻度重金属污染的矿业废弃地土壤。2引入固氮生物。利用生物固氮作用在重金属含量较低的废弃地进行土壤改植被重建显出很大的作用和潜力。。对于具较高重金属毒性的废弃地,必须用相应的工程措施(如掺入一定比例的污水污泥等)以解除其毒性,保证植物结瘤固氮。菌根能够有效地利用基质中的磷,而且不受尾矿中富含金属的毒害,所以将其接种于相应的共生树种,可以较好地适应废弃地的生境,这对尾矿上植物定居起着重要作用,达到一定的改良目的。望采纳。
爱旅游的小M
3D printer principle is very simple, each layer of the printing process is divided into two steps, first in the need to spray a layer of special glue, glue droplets itself is very small, and not easy to spread. And then is sprayed with a layer of uniform powder, the powder will be quickly cured adhesive bonding, and the area is still not the glue is still loose state. In this case, the solid model will be printed in a layer of glue. After the completion, to deal with the items around the stained powder, which can be recycled, and then coated with the increase of hardness of the glue.3D打印机原理很简单,每一层的打印过程分为两步,首先在需要成型的区域喷洒一层特殊胶水,胶水液滴本身很小,且不易扩散。然后是喷洒一层均匀的粉末,粉末遇到胶水会迅速固化黏结,而没有胶水的区域仍保持松散状态。这样在一层胶水一层粉末的交替下,实体模型将会被打印成型。完成后,要处理掉物品周围沾满的粉末,这是可以循环使用的,再涂上增强硬度的胶水。
你怎么都注册了
3D打印机工作原理中文:3D打印是添加剂制造技术的一种形式,在添加剂制造技术中三维对象是通过连续的物理层创建出来的。3D打印机相对于其他的添加剂制造技术而言,具有速度快,价格便宜,高易用性等优点。3D打印机()就是可以“打印”出真实3D物体的一种设备,功能上与激光成型技术一样,采用分层加工、迭加成形,即通过逐层增加材料来生成3D实体,与传统的去除材料加工技术完全不同。称之为“打印机”是参照了其技术原理,因为分层加工的过程与喷墨打印十分相似。3D打印机工作原理英文:3D printing is a form of additive manufacturing technologies, in additive manufacturing technology of 3D object is created by the continuous physical layer.3D printer compared with other additive manufacturing technology has the advantages of fast speed, low price, high usability, etc.. A 3D printer is that you can print out a kind of equipment in real 3D objects, function and laser molding technology, using hierarchical processing, superposition forming, that is, through increased material layer by layer to generate a 3D entity, with conventional removal of materials processing technology is completely different. The reference to the technical principle of "printer", because the process of layered processing with ink-jet printing is very similar.
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