法律是一个规则系统,是义务的主要规则与承认、变更和裁决的次要规则的结合。
煤炭不仅仅是一种商品,更是现代文明赖以建立的基础。
The only thing that stands between you and your dream is the will to try and the belief that it is actually possible.
"Parental investment is the key to understanding the origins of sex differences."