[qiān dìng]

sign [conclude; enter into] a contract
簽訂合同

sign a treaty
簽訂條約

sign an agreement
簽訂協(xié)議

the parties signatory to the agreement
簽訂協(xié)定的各方

The two countries signed a cultural agreement.
兩國(guó)簽訂了文化協(xié)定。