每个回声都包含着它所处空间的历史。
"Every echo contains a history of the space it inhabits."
A law of nature， lex naturalis， is a precept or general rule found out by reason， by which a man is forbidden to do that which is destructive of his life or takes away the means of preserving the same.
The search for happiness is one of the chief sources of unhappiness.
Nature is written in mathematical language.