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unarexploration
Thereis now cast-iron evidence for wateron the Moon
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One, led by Paul Hayne of the University of Colorado, Boulder, shows that more of the Moon’s surface is in
perpetual
shadow than was previously believed. This matters because ice—the form in which any lunar water is likely to exist—would be stable and long-lived in such cold, shaded regions. Most of the lunar surface
is bathed in
harsh
ionising
radiation from the sun, soany water molecules present would swiftly be torn apart or disappear into space. But Dr Hayne’s work calculates that there are around 40,000 squarekilo metres of these ice-preserving “cold traps” on the Moon.
per
·
pet
·
u
·
al
adjective usually before noun
continuing all the time without changing or stopping
连续不断的，无休止的
; SYN continuous
•
theperpetual noise of the machines
机器连续不断的噪音
•
alittle girl with a perpetual smile
总是带着微笑的小女孩
bebathed in light / sunshine etc
an area or building that is bathed in light has light shiningonto it in a way that makes it look pleasant or attractive
沐浴在光线
/
阳光等之中
:
•
The topof Pea Hill was bathed in brilliant sunshine.
豌豆山的山顶沐浴在灿烂的阳光中。
to form ions or make them form
（使）形成离子
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