查询词典 xylem rays

The paper presents a new filling-sample method by which the sample quantity filled in a box depends on the energies of γ-rays to be measured. The detection efficiencies of HPGe detector were calculated by using Monte-Carlo method for various γ-ray energies and at various soil sample quantities in a box, and the optimal filling-sample quantities for different-energy γ-rays from radioactive nuclides of 238U, 232Th, 226Ra, 40K, are respectively obtained.

本文提出了样品装量与待测γ射线能量有关联的装样方法，并用蒙特卡罗方法模拟计算了不同能量γ射线的探测效率与样品装量之间的关系，得到用HPGe γ谱仪分析238U、232Th、226Ra和40K等放射性核素活度各自的最佳装样量。

Among all sorts of radiotherapy equipments, linear accelerator fundamentally takes use of electronics rays and X-rays to treat an illness.

在常用的治疗设备中，直线加速器主要是利用电子线和X射线照射靶区来达到治病的目的。

The first profile encloses a Master card that generates between two and six infrared rays and transmits them to a Slave card, placed inside the second profile that has the task of retransmitting the rays received to the Master card, acting as a kind of "electronic mirror".

一侧嵌入发射器，在两侧之间产生六道红外线，投射向安装在另一侧的接收器，再经其返回发射器，类似一种&电子反射镜&。

The Cherenkov telescopes do not actually detect the gamma rays directly but instead detect the flashes of visible light produced when gamma rays are absorbed by the Earth's atmosphere.

只有10 ％的伽玛射线源的非瞬态来源。这些稳定的伽玛射线发射器包括脉冲星，中子星和黑洞的候选人，如活动星系核。

As professor of physics at the University of Wurzburg, he was experimenting with a Crookes' radiometer when he noticed that when cathode rays struck the end of the tube, rays of a new kind were emitted that were capable of penetrating matter.

作为Wurzburg大学的物理教授，Roentgen当时正在使用Crookes的放射计进行试验。他注意到当阴极射线撞击到射线管的末端时，会发出一种能够穿透物体的新型射线。

Results There were differences in shape and layers of velamen cell, number of xylem bundles, maximum diameter of vessels, organization of pith, as well as the types, quantity, and size of crystals. D. fimbriatum could be distingushed from its adulterant species D.

结果根被细胞的形状及皮层厚度，中柱的木质部束数、导管的直径、髓的构成，晶体的类型与大小存在种间差异。

The canals originated in the alburnum during the very year in the form of cavities by the malformation, disfunction and solubilization of the youngest cells of secondary xylem.

我国枫香资源相当丰富，大量分布于华东、中南及西南各省，目前国内正在进行对此资源作深入开发应用的研究工作［1］。

What is the "annual ring" It is made of the xylem, the congregation of the pipes that carry water in a tree.

何谓『年轮』？输送水分的导管集合起来成为木质部，年轮就是由木质部构成的。

Intrafascicular CAMBIUM between xylem and phloem . annual ring Secondary phloem See secondary growth .

这种细胞存在于根和芽的顶端分生组织以及在原来分裂组织基础上形成的侧生分生组织，如位于木质部和韧皮部之间的束中形成层。

The sowing depth of spring sowing (through the stratification of damp sand) was optimum at 5~6cm, and the seedling emergence rate was up to 98.5%. Chop, chip, abdomen grafting and bud grafting with xylem went well in early and middle March and the suitable slacking time was from late July to early August.

春播播种深度以5~6cm为佳，出苗率达98.5%；劈接、切接、腹接、带木质部芽接宜在3月上中旬进行，适宜的解绑时间是7月下旬~8月上旬。

Smoking cigarettes adds to the Computer Desk Computer manufacturer computer mouse Computer Computerized collar knitter machine Conduit Bodies construction board Container Bag Control Arm Cooking Thermometer general levels of air pollution as well as damaging our health.

吸烟不仅对健康有害，而且增加空气污染程度。香烟雾含有多种有害物质：不仅有致癌化学物质、有某种能阻止氧气进入血液的气体，还有引起血压增高、心速加快的被称为尼古丁的物质。

He is one of my favorite actors.

他是我最喜欢的男演员之一。