Tertiary was mainly frigidly dry in the inland subtropics and semiarid to warm and cool in plateau.

第三纪为内陆亚热带的干燥、半干燥→高原温凉气候；

Days were filled with swimming in frigidly cold high mountain lakes and streams and lazy rides on the horses.

在那些日子里，我要么整日在刺骨般寒冷的高山湖与溪流中游泳，要么就懒懒地骑马四处游荡。