As regarded its origin there were various explanations, all of which must necessarily have been conjectural.至于其来源,则有着种种解释, 当然都是些臆测.Theories about the extinction of dinosaurs are still highly conjectural.关于恐龙灭绝的理论仍然是带有很强的...
The unconformity marks the change from fluvial to marginal marine deposition.不整合面标志着河相至边缘海相沉积的相变.Continued deposition of silt along the coast is crucial in counteracting the rise in sea level.海岸边泥沙的不断沉积对于抑制海平面的上升起着至关重要的作...
This microscope magnifies 40 diameters.这台显微镜能放大40倍.This version of the Digges telescope magnifies images 11 times.这种型号的迪格斯望远镜可将图像放大11倍。This version of the Digges telescope magnifies images 11 times...这种型号的迪格斯望远镜可将图像放大11倍...
The Valley of Vinales is a lush and fertile valley and one of Cuba's finest beauty spots.比尼亚莱斯谷草木繁茂，土地富饶，是古巴最美的风景胜地之一。Irregularly shaped brown or blue spots in the nail bed can be melanomas.甲床上不规则的棕色或蓝色点可能是黑索瘤.Secur...