They found that success in learning correlated with the amount of stage-2 non rapid eye movement (NREM) sleep, the stage preceding deep rapid eye movement (REM) sleep.

他们发现学习上的成功和第二阶段非快速眼动（NREM）相关。 NREM是深快速眼动（REM）睡眠之前的阶段。

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The lens of the eye is very sensitive to ionizing radiation and cataracts are known to result from effective doses of about 2 Sv.

眼球晶状体对电离辐射非常敏感，据知约2sv的有效剂量即可导致白内障。

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Both planets are thought to have overlapped in the night sky making them indistinguishable to the naked eye on June 17, 2 B.C..

公元前2年6月17日，两颗行星在夜空中重叠使得肉眼无法对其分辨。

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Developed in partnership with NTT DOCOMO's manufacturing partner, Fujitsu, the ibeam prototype uses the most advanced and compact eye tracker in the world, the Tobii IS20 (formerly Tobii IS-2), allowing an unsurpassed eye-tracking experience when using the device.

ENGADGET: Tobii, Fujitsu and NTT DoCoMo partner on eye tracking ibeam tablet, promise a peek in October

In fact, four of the top 10 drugs listed are oncology treatments, although the No. 2 spot went to the Lucentis eye treatment, which is another Roche drug.

FORBES: Orphan Drugs: 'Rare' Opportunities To Make Money

It is Asia-meets-Las Vegas at the enormous, eye-catching and now iconic 2, 561-room Marina Bay Sands on the eastern edge of the CBD.

BBC: Business trip: Singapore