pterosaurs, like these depicted gliding near an ancient sea, first arose during the triassic period about 215 million years ago.
翼龙一样,这些描绘滑翔附近的一个古老的大海,首先出现在三叠纪时期,约2.15亿年前。
the triassic period ended 210m years ago with another mass extinction of land animals and sea creatures.
1亿年前,三叠纪(thetriassic period)结束,此时又出现一次陆地和海洋生物的大灭绝。
the analysis result shows that triassic strata, loose tectonic lines and lava thermal-fluid from triassic period are the main ore-cont rolled factors in that area.
结果表明,三叠系地层、构造撒开区及三叠纪以来的巖浆热液活动是最主要的控矿因素。
lizards are cold-blooded reptiles, and it appears in the early triassic period is very similar to reptilian ancestors.
蜥蜴属于冷血爬虫类,和它出现在三叠纪时期的早期爬虫类祖先很相似。
the basement is the metamorphic rock at siniansystem or pre- sinian system and has deposited the stratum from triassic period to quaternaryperiod.
其形成于晚中生代,基底为震旦系或前震旦系变质巖,沉积了三叠纪至第四纪的地层。