单词：isopycnic
passing through points at which the density is equal; as, an isopycnic
line or surface.
n. A line or surface passing through those points in a
medium, at which the density is the same.
isopycnic的用法和样例：
词汇搭配
- isopycnic surface等密度面
- isopycnic centrifugation等密度离心
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