Most geologists and many historians today believe that Wegener's theory was rejected because of its lack of an adequate mechanical basis.
Stephen Jay Gould, for example, argues that continental drift theory was rejected because it did not explain how continents could move through an apparently solid oceanic floor.
However, as Anthony Hallam has pointed out, many scientific phenomena, such as the ice ages, have been accepted before they could be fully explained.
第一句和第二句的关系是什么？