The uniformity of the hybrids in the first generation, the dissimilarity in the second, are facts which cannot escape the attention of an accurate observer.
城市的穷人就像树的根:看不见,但对生存至关重要。
我们不是从祖先那里继承地球;我们是从子孙那里借来的。这一原则指导着我们迈出的每一步。