真空

More issue, you could refer to the exercises of chapter 2 by Weinberg, where Weinberg ask you to calculate the spin transformation under Lorentz transformation.

我的意图是把质量归于被囚禁的光速运动能量，从而假定我们所在的真空背景平均宏观速度相对于任何惯性系都为零。

We have developed a simple technique for preparing low-current evaporation source of transition metal that can produce high-purity atomic beams with good lifetimes.

设计了一种超高真空使用的低电流过渡金属蒸发源，它能产生高纯金属原子束，且具有一定的寿命。

In conventional conditions, the lowest temperature for SiGe growth is about 550℃.

在双腔超高真空化学气相淀积生长中，通常采用液氮冷却的方法。

It is found that, compared with the vacuum sintering, the magnet sintering at argon protection has lower density, magnetic-energy product and remanence, but coerciveforces are higher. The magnet has more and bigger pores, and there obviously exist loose microstructure, the Nd-rich phases are clearly distributed along the grain boundaries mainly in the shape of lumpish and lamelliform.

研究发现，与真空烧结相比，采用Ar保护烧结时磁体的密度、磁能积和剩磁相对较低，矫顽力较高，磁体中形成的孔洞较多，孔径较大，并有明显的显微缩松存在，富Nd相的数量明显较多，且主要呈块状和片状沿晶界分布。

Explanation: Awkward and angular looking, Apollo 17's lunar module Challenger was designed for flight in the vacuum of space.

说明：难以操纵而且外表生硬，阿波罗17号的挑战者登月舱，是被设计来用于在真空空间飞行的。

Then the microstructure and optical properties of cerium doped lutetium aluminum garnet fabricated by the Shanghai Institute of Ceramics are reported.

采用高温固相反应和共沉淀方法通过真空烧结工艺可制备透过率达77%的LuAG：Ce透明陶瓷。材料显微结构均匀，平均晶粒尺寸为10μm。

Objective To introduce the method for preparing solid protein pharmaceuticals by lyophilization .

目的介绍真空冷冻干燥技术制备蛋白质药品的方法。

The protection system of small intelligent flameproof vacuum magnetic starter used in mine which is composed of 80C196KC single chip microcomputer of MCS 96 series was introduced, in which short circuit protection, open phase protection, overload protection were realized by software.

介绍用MCS - 96系列的 80C196KC单片机构成的智能化矿用隔爆小型真空磁力启动器保护系统，其中短路保护、断相保护、过载保护均采用软件实现。

Firstly, a two-dimensional (2-D) magnetohydrodynamics model is developed for low current vacuum arc.

本文首先针对小电流真空电弧建立了二维磁流体动力学模型。

The company is a high-tech enterprises, professional development, production and sale of vacuum magnetron sputtering target.

本公司是一家高科技企业，专业研发、生产和销售真空磁控溅射靶材。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。