The 'gold' pits isn't likely to be ferried back to Earth, though - scientists remain unsure of the chemical composition of the yelllow, shimmering dust that lines the pit walls every 'summer'.

可是那些在凹点的金线不太可能被带回地球，所以科学家还不能确定这在每个“夏天”都在凹点排成线而且发光的黄色灰尘的化学成分。

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Believe it or not there are still some people out there that are ignoring social media. They may be unsure of how to participate or maybe they just don't have time to get involved.

完全无视社会媒体的存在： 有人把它捧得老高，但是就是有那种不顾一屑，完全脱离社会媒体的群体，不要觉得奇怪，或许他们不知道怎么参与进来，又或许他们根本没时间。

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Many people are unsure of the HIV status of their partners, and those who are faithful cannot be certain that their partner is maintaining the same commitment.

许多人并不清楚他们的伴侣是否携带艾滋病毒，而且那些忠贞不二的人们也不能确定他们的伴侣是否同样忠贞。

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Late last week, in an interview with Automotive News, Ghosn also sounded unsure that a deal would be struck.

FORBES: Ghosn Sees GM Reluctant Ahead Of Meeting

With that being a T-Mobile exclusive for now, however, we're unsure that it'll be the recipient of so much pomp and circumstance.

ENGADGET: Samsung set to reveal next US Galaxy device on August 15th

Scientists are also unsure about the quality of vision that could be restored from stimulating nerve cells alone, as, in normal circumstances, there is a sigificant amount of visual processing that occurs between the photoreceptors and the nerve cells.

BBC: NEWS | Health | Spinach may hold blindness cure