查询词典 xylem rays

This means protection not only against sunburns from UVB rays, but also against the long term skin damage that is associated with UVA rays.

这意味著，保护不仅是对紫外线灼伤从射线，而且也对长期皮肤损伤是与长波紫外线照射。

This means protection not only against sunburns from UVB rays, but also against the long term skin damage that is associated with UVA rays.

这意味着，保护不仅是对紫外线灼伤从射线，而且也对长期皮肤损伤是与长波紫外线照射。

Armed with his arsenal of shrink rays, freeze rays, and battle-ready vehicles for land and air, he vanquishes all who stand in his way.

眼下他正准备筹划一次有史以来最最最伟大的偷天盗窃行动——把月亮给偷走！

The ray from the plasma lamp will go through into the light pipe with little incident angle after reflection by the reflector, and then the total reflection of the ray will occur among the prismatic reflecting films. Some ray may come to the end mirror and will be reflected back, and only a little of rays pass through the prismatic reflecting films, most of the rays will go forward by the action of the bottom light extracting surface and go out to be lighting.

等离子灯球发出的光线经过反射器反射后，以很小的入射角进入到导光管，光线在棱镜反光膜管子内进行全反射，到达丙烯酸树脂管端底镜面的光线，再反射回到管子内部，只有少量的光线透过棱镜反光膜出来，最终大部分光线通过管子底部的光线提取面引出管外，传送到所需要照明的宽广区域（见图7）。

In a camera, light rays pass through a series of lenses that focus images onto film.In a healthy eye, light rays pass through the cornea and lens, which focuses images onto the retina, a layer of light-sensing cells lining the back of the eye.

在照相机中，光线经过一系列的透镜，把图像聚焦在胶片上，在健康的眼睛中，光线通过角膜和透镜，把图像聚焦到视网膜上，而视网膜是一层排列在眼底的光敏单元。

The dose enhancement effects and decreasing effects caused by material inhomogeneity were studied quantitatively with a parameter named Dose Perturbation Factor, which was the ratio of the dose at a point in the heterogeneous phantom to the dose of the same spatial location point in the homogeneous phantom. It was showed that the degrees of the dose enhancement or decreasing depended on the energy of radiation, field sizes of the beamlets and compositions of the media. The dose perturbation for high energy X rays is greater than that for low energy X rays. At the same energy condition, the dose perturbation decreased when the field size increased. And the relationship between them was not linear.

模拟结果表明：在小射野情况下，异质组织界面处出现了较大的剂量跃变，剂量扰动效应的强弱程度取决于射线的能量、射野的大小和模体介质的不同等多种因素，高能X射线条件下的剂量扰动效应大于低能X射线条件下的剂量扰动；在入射X射线能量相同的条件下，剂量扰动效应随射野尺寸的减小而增强，并呈现一种非线性关系。

The pupil diameter of different diopters changes greatly under different rays, and it is a very important parameter to measure the pupil diameter in different diopter under different rays before the refractive surgery.

不同屈光度在不同光线下瞳孔直径有很大的变化；不同屈光度在不同光线下的瞳孔直径是屈光手术前评估的一个重要参数。

The maximum entropy principle is utilized to calculate the probability of stochastic rays undergoing k reflections.Finally,the applications of stochastic rays are investigated: the...

最后介绍使用随机射线建模超宽带室内信道的多径传播轨，在此基础上可以得到信道特性建模的基本随机变量，以及无线电波传播的概率模型等应用。

It can also occur if the radiation is in the wavelength range of ultraviolet radiation, X rays, or gamma rays.

如果辐射的波长范围是紫外辐射、X射线或γ射线，也可以发生光电效应。

Rays striking the earth at an angle have to plough through many more miles of atmosphere than rays coming straight down from overhead.

斜射在地球上的光要比头上直射下来的光多经过许多英里的大气层。

The system can be widely used in belt weighing and batching process control,etc.

介绍了基于智能模糊控制的嵌入式配料系统的设计方法，对模糊PID控制过程和系统调零作了重点的讨论，同时给出了PID控制的程序流程图和系统定长调零子程序。

"I dunno," she answered,"but if you show me aroun', I'll recognize it from the lighthouse just outside the porthole."

"我不知道，"她回答说，"如果你能带我转转，我能认出来的，因为灯塔就在舷窗外。"