Light emitted from farther away, and thus older, quasars lacked this wavelength, because the light was getting absorbed by neutral helium as well as helium with a single ion-or charged particle.

光线的发射处越远，年龄越大，类星体的光谱会缺失，因为某些波长的光线会被中性氦及氦离子或带电粒子吸收。

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Ion engines are incredibly efficient, which makes them well suited to deep space travel.

离子引擎是令人难以置信的高效率，所以非常合适深入的太空旅行。

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Helium ion microscopy (HIM) offers the highest spatial resolution surface imaging of any scanning beam method, as well as extremely high surface sensitivity.

氦离子显微镜能够提供所有扫描射线法中最高空间分辨率的表面图像，以及极高的表面灵敏度。

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When iON Adventure is used with the Wi-Fi PODZ and the iON app for iOS and Android, users can transform their smartphone or tablet into a powerful remote for the iON Adventure as well as instantly share their moments via YouTube, Facebook, Twitter, email and the iON CloudTM service.

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Pulickel Ajayan and his colleagues chemically optimised the recipe for each of their five layers, using blends of chemicals common in lithium-ion batteries as well as novel materials including carbon nanotubes - tiny "straws" of carbon with incredible electronic properties.

BBC: 'Paint-on' batteries demonstrated

It plans to invest the proceeds in lithium ion battery production as well as auto parts and solar cell projects.

FORBES: Buffett-Backed Billionaire Plans Electric Cars In U.S. in 2010