biotasCOCA¹⁵⁶⁵⁸⁹BNC¹⁴⁴⁶⁶⁴⁺³ 基本例句 n.生物区医生物区系原型biota的复数 The discovery of Ordovician- Devonian biotas and strata provide new important evidence for the stratigraphic division and correlation and the study of the tectonic evolution of the Qiangtang area. 羌南地区奥陶纪—泥盆纪生物和地层的发现，为与邻区地层划分对比和探讨羌塘构造演化提供了重要依据。 cnki