大陆漂移的第一个概念早在1910年就出现在我脑海中,当时我在看世界地图,受到大西洋两岸海岸线吻合的直接印象影响。
最好的乳制品来自于对生产每个阶段卓越的承诺。
There are no hard distinctions between what is real and what is unreal, nor between what is true and what is false. A thing is not necessarily either true or false; it can be both true and false.