A plane propelled by two jet engines.

Study and Discussion on Projects of Combined Air-Breathing Jet Engines for Earth/ Orbit Space Transportation System

天地往返运输系统空气喷气组合式发动机方案探讨

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Numerical computations of infrared signatures in exhaust flow fields of jet engines

发动机燃气喷流红外辐射场的数值模拟

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Trend analysis of jet engines is an analytical technique widely used in engine performance monitoring.

航空发动机状态的趋势分析，是一种广泛地应用于航空发动机性能监控的分析技术。

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Experts say volcanic ash can cause problems for jet engines.

专家称，火山灰可能造成飞机引擎故障。

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The US scientists have found a way of converting food rubbish into a highly powerful paraffin suitable for jet engines.

美国的科学家们发现了一种方法，可以将食物垃圾转化成一种适合喷气式发动机的高能煤油。

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Application of Reflected Light Microscope to Identification of Gold and Silver Jewellery and Gemstone

反光显微镜在金银饰品与宝石检测中的应用

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If you prefer a different gemstone, there are many other wonderful choices.

如果你喜欢不同的宝石，还有很多其他美好的选择。

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Burma gemstone resources exploration and Yunnan mining industry

缅甸宝玉石资源的勘查开发与云南地矿业

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If you want a healing gemstone, you may wish to consider one of these.

如果你想有一个愈合的宝石，你不妨考虑其中之一。

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Ruby is one of four kinds of precious gemstones, and has much market share.

红宝石是四大名贵宝石之一，在宝石市场上占有很大的份额。

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Source& Features of Chinese Gemstone

中国宝玉石分布与特征的研究

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Experimental Studies on Color and Appearance Alteration of Zircon Gemstone

宝石锆石改色改性的实验研究

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STUDY ON CUTTING OF SPECIAL MATERIALS OF GEMSTONE Advance in Research of Gemological Diamond Materials

特殊宝石材料的加工工艺探索宝石级金刚石材料研究的进展

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A smooth surface ( as of a bone or cut gemstone).

光滑的表面（象骨头或雕琢的宝石）。

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A red transparent variety of zircon used as a gemstone.

一种红色透明的锆石，用作宝石。

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Explore the New Laser Crystals from Mineral Gemstone

由矿物宝石中探索激光新晶体

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The Application of Micro-Raman Spectroscopy to the Identification of Gemstone

一些天然、合成及仿造宝石的显微拉曼光谱鉴别

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There is a huge range of gemstone quality.

这是一个巨大范围的珠宝玉石质量。

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A gemstone having the property of transmitting light without serious diffusion.

能够透光但漫射不强的宝石。

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Application of Polarizing Microscope to the Identification and Research of Gemstones

大型偏光显微镜在珠宝鉴定与研究上的应用

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