contract

n. 合约,婚约,立约
v. 缩短,缩小
v. 订约

The city contracted for a library with their firm.

市政当局和他们公司订立了修建图书馆的合同。

Marriage is, first of all, a contract which must be governed by justice.

婚姻首先是一种契约，它必须以公正为制约。