富集度一般指核燃料中U235的质量分数，也即核燃料棒中U235的丰度的转换（丰度指核子数之比）。因铀浓缩的过程又称为富集而得名。
改动-行星资源富集度函数现增加一资源类型参数。
Changed - Script function "Sys_Change_Planet_Value" now takes an additional parameter of the resource type.
油页岩灰渣中稀土元素和微量元素富集度均高于油页岩。
The contents of both REE and trace elements in the oil shale residue are higher than those in oil shale.
既然浮游植物不会被那么快地吃掉，它们的富集度也开始增加。
Because they are not being eaten so fast, the abundance of phytoplankton begins to increase.
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