Science is not just about facts, but about understanding the underlying principles that govern those facts.

I think of other ages that floated upon the stream of life and love and death and are forgotten,and I feel the freedom of passing away.

历史上的大战——我们在布匿战争中已经看到这一点——源于国家间的不平衡发展。

土地是我们的母亲，河流是我们的血液。我们必须保护她，因为她是我们的生命。