The design of high speed railway is a kind of high synthetic systems engineering.

高速铁路设计是一项综合性很强的系统工程。

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There are many methods for sending synthetic keyboard and mouse events to applications that may prove useful if operating on other operating systems.

如果在其他操作系统中运行，那么可以使用多种方法将合成的键盘和鼠标事件发送给应用程序。

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One option, ironically, is to use carbon dioxide to replace the synthetic HFC refrigerants used in such systems, he says: such gases can have around 4000 times the global warming potential of CO2.

一种可选的办法，具有讽刺意味，是用二氧化碳替代在这类系统中使用的合成 氟化烃 制冷剂，他说：这类气体造成全球变暖的可能性是二氧化碳的四千倍。

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Synthetic vision systems were created by NASA and the U.S. Air Force back in the late 1970s to improve cockpit situational awareness, especially when operating in reduced visibility at low altitudes.

FORBES: Flying Blind No Longer

Small airplanes flying today already are equipped with sophisticated gear that just a few years ago was available only to airline or military pilots: terrain warning systems, synthetic vision, direct GPS navigation, and more.

FORBES: Will Your Next Airplane Be A Drone?

Along with Tobias, fellow Ukrainian Antonina Yefremova was charged after synthetic testosterone was found in their systems, while Bulgaria's Inna Eftimova tested positive for a synthetic growth hormone.

CNN: Nine athletes banned for doping offenses