Law is a system of rules, a union of primary rules of obligation and secondary rules of recognition, change, and adjudication.

种树的最佳时间是25年前，第二好的时间是今天。

我们致力于通过创新技术创造一个更清洁、更绿色的未来。

The world is a book, and those who do not travel read only one page.

乳制品应该既营养又美味。