Many areas of the lunar South Pole are literally frozen in time, holding preserved clues to the formation of our solar system.

月球南极的很多地区都保留着古老的地理线索，对研究太阳系的形成很有帮助。

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Now forty years after the first moon landing, NASA has turned its attention back to lunar missions, this time planning to stay longer.

在首次登陆月球40年后的今天，美国宇航局再次将注意力转向了月球探索，这一次他们计划要在月球逗留更长的时间。

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Roommates might get their periods at the same time because of the moon's lunar cycle , Wider says.

再扯远一点， 因为月球周期的缘故 ， 同住一室的伙伴的经期可能会变得相同。

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They had to do this by firing the lunar module rocket engine for just the right amount of time.

VOA: special.2009.07.22

The Lunar New Year begins February 14, and is traditionally a popular time for travel in Asia.

VOA: standard.2010.02.04

Armstrong's seemingly casual reaction to peril left his NASA colleagues in awe when, in May 1968, he picked exactly the right time to eject from a lunar landing simulator that had spun out of control.

CNN: Neil Armstrong, a hero who shunned fame

The watch was used to time the duration of the Descent Orbit Insertion maneuver and to time the rendezvous maneuvers after launch from the lunar surface.

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Apollo 17's Harrison Schmitt -- a geologist at the time, and the only scientist to make the lunar journey -- served a term as U.S. senator from New Mexico, but was defeated in a run for re-election in 1982.

CNN: After walking on moon, astronauts trod various paths