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Highly flammable substance made from cellulose nitrate and camphor; used in e.g. motion-picture and X-ray film; its use has decreased with the development of nonflammable thermoplastics.

极易燃烧的物质，用硝酸纤维素和樟脑制成，用于电影胶片和x光胶片中，由于不可燃烧的热塑性塑料的发展，已减少使用。

Hundreds of other x-ray sources—stellar black holes and neutron stars—also inhabit Centaurus A.

数百个其它放射线的来源――是恒星黑洞群和中子星座――同样位于人马座A部位。

Hundreds of other x-ray sources—stellar black holes andneutronstars—also inhabit Centaurus A.

数百个其它放射线的来源──是恒星黑洞群和中子星座──同样位于人马座A部位。

The X-ray crystal structure reveals that thiourea coordinates with Pd via S atom,and the complex as a whole was in complete symmetry with palladium atom at the symmetry center of the plane square structure.

硫脲是有效反萃剂，从萃合物的晶体结构看出，硫脲通过S原子与Pd配位，萃合物以Pd原子为中心构成平面正方型结构。

The development of modern computer imaging process makes it possible to solve this problem, and the development of digital X ray radiography technique put s forward an urgent demand for computerized automatic measurement and analysis system of cephalometry.

现代计算机图像处理科学的发展，使得这一问题的解决成为可能，而数字化X线摄影技术的发展，对开发全自动计算机头影测量分析系统提出了迫切的要求。

Key words: skeletal class III malocclusion; X-ray cephalometry; hard and soft tissue

关键词］骨性III类错牙合； X线头影测量；软硬组织

Methods The appliance was used on 15 adult subjects with Angle Ⅲ malocclusion and then compared clinical character and X-ray cephalometry before and after treatment.

矫治成人患者15例，进行临床表现及相关硬组织测量。结果：固定反式TBA戴用4个月后下颌明显后退。

MethodsThe appliance was used on 15 adult subjects with Angle Ⅲ malocclusion and then compared clinical character and X-ray cephalometry before and after treatment.

矫治成人患者15例，进行临床表现及相关硬组织测量。结果：固定反式TBA戴用4个月后下颌明显后退。

It is found by X-ray diffraction that the solution of Sm2O3 and Gd2O3 in ceria for the samples sintered in the range of 1 400─1 550 ℃ is better, but for the sample sintered at 1600 ℃, a new phase is formed with the reduction of lattice constants.

X射线衍射分析发现：对1 4001 550 ℃烧结的样品，Sm2O3和Gd2O3固溶较好﹔但对1 600 ℃烧结的样品，有新相生成，同时晶格常数减小。

Glass-ceramics of CaO-Al2O3-SiO2 system doped with ceria were prepared by sintering method and were characterized by differential thermal analysis, X-ray diffractometry, scanning electron microscopy and property measurements.

采用烧结法制备添加氧化铈的CaO-Al2O3-SiO2系微晶玻璃材料，并对其进行差热分析、X射线衍射分析、扫描电镜观察和性能测试。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了