It is compared to the wavelets produced by a stone dropped in w ater, only that in the case of sound the waves are not confined to one plane. 李贝.西洋科学史.
The child inherits less definitely organized instincts, but gre ater plasticity, than the lower animals. 李贝.西洋科学史.
L ater Copernicus spent nine years in Italy, studying at the universities and acquainting himself wit h Ptolemaic and other ancient views concerning the motions of the planets. 李贝.西洋科学史.