1999年以来，在北昆仑地区晚古生界中上石炭统库尔良群中发现了基性岩浆岩带。
After 1999, the basite zone was found in the group of Kuerliang in middle-upper Carboniferous, in the Late Paleozoic strata of the North Kunlun area.
在第二章，我们主要研究了适当半群的完备矩形带上的良同余。
In Chapter 2, we will study good congruences on perfect rectangular bands of adequate semigroups.
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