He is on a trek through the South Gobi desert.他正徒步穿越南戈壁沙漠。Most of the trek is along worn paths.大部分時候都是沿著被人踩得坑坑洼洼的小路跋涉。Joyce Bryt is a devoted Star Trek fan.喬伊絲·布賴特是《星際迷航》的狂熱粉絲。...
The courses are long and punishing, with steep gradients.這些賽道既長又有陡坡,極具挑戰性。Across geographic gradients, Levins expects allopatric races or coenospecies exist.穿過地理梯度, 萊文斯預料有分布區不重疊的小種或近群種.And the evidence is that the differ...