The moon's low gravity also means that water composed of regular hydrogen and oxygen will escape quicker than heavy water, perhaps leading to a concentration of deuterium in the water of the moon.
月球的低重力也意味着由普通氢气和氧气组成水将会比重水更快的消失，可能导致在月球上水的氘含量。
Researchers said the zircon's high level of heavy oxygen isotopes suggest it was cooled by surface water after it formed.
研究人员说锆石的高标准重氧同位素暗示了它形成之后靠地表水来冷却。
The formation of heavy oil reservoirs is chiefly controlled by late uplifting of the basin, biodegradation, water-washing, and free oxygen oxidizing.
重质稠油藏的形成主要受盆地后期抬升活动、生物降解、地层水洗和氧化作用等因素控制。
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