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- density of an electron beam 电子束密度
- Indeed the use of an electron beam or X-rays for irradiation overcomes the need for a radioactive source altogether. 用电子束或X-射线进行辐照确实完全解除了对某种放射源的需要。
- The secondary backscattered electron current is used to modulate the intensity of an electron beam in a cathode ray tube(CRT). 二次电子或背散射电子的电流被用来调制阴极射线管(CRT)中电子束的强度。
- Indeed the use of an electron beam or X-rays for irradiation overcomes the need for a radioactive source altog. 用电子束或X-射线进行辐照确实完全解除了对某种放射源的需要。
- Its a black hole about the size of an electron. 是一个只有电子大小的黑洞。
- Represents the address of an electronic mail sender or recipient. 表示电子邮件发件人或收件人的地址。
- The density of an ideal gas at constant pressure varies inversely with the temperature. 理想气体在不变的压力下密度与温度成正比。
- Let us think of an electron as a wave extending in a circle around the nucleus. 我们不妨把电子看成是一个绕原子核展开的波。
- Their idea was that a normal star implodes until its core reaches the density of an atomic nucleus. 他们认为,正常的恒星必须在其核心密度增加到与原子核密度相当时,才会爆炸。
- Densitometer: Instrument used to measure the optical density of an area in a processed image by transmittance or by reflectance. 密度计:通过透射光法或反射光法来测定被冲洗的影像区域内的光学密度的一种仪器。
- The density of population in this city is very high. 这个城市的人口密度非常高。
- We could obtain arbitrary interaction length by means of an axially movable "kicker" magnetic field that deflected the electron beam. 我们利用偏转磁场可以获得任意的相互作用区长度。
- The area had a population density of five people per square mile. 该地区人口密度为每平方英里五人。
- The model uses indistinct and overlapping "probability clouds" to approximate the position of an electron. 该模型使用模糊和重叠的“概率云”近似表示一个电子的位置。
- An ionic bond is characterized by the transfer of an electron from one atom to the other. 离子键的特点是一个电子可以从一个原子转移到另一个原子。
- What we want to know is whether the weight of a proton is much greater than that of an electron. 我们要知道的是,质子的重量是否比电子的重量大得多。
- Do you know the density of population in this area? 你知道这个地区的人口密度吗?
- A positively charged electrode, as of an electrolytic cell, a storage battery, or an electron tube. 阳极,正极电解电池、蓄电池或电子管的正电电极
- Japan has a high density of population. 口密度很大。
- IS THE POPULATION DENSITY OF CHINESE CITIES HIGH? 中国城市的人口密度高吗?