包气带中的水会沉降到地下水位，只在矿物颗粒表面留下一层薄薄的水膜。
Water in the vadose zone drains down to the water table, leaving behind a thin coating of water on mineral grains.
在最新的一项研究中，研究人员在月岩和月陨薄碎片中找到了磷灰石的矿物颗粒。
In the new study, researchers located grains of the mineral apatite in thin sections from the moon rocks and meteorite.
对此技术进行了改进，即将矿物颗粒引入到两个平行重叠放置的磨石之间。
The technique was improved by allowing the mineral particles to flow between two horizontally laid grindstones, one on top of the other.
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