Subject + 签订 + 了 + Agreement
签订 (qiāndìng) means "to sign" or "to conclude," specifically referring to the formal signing of contracts, agreements, or treaties. It is more formal than 签 alone and implies a binding commitment between parties. For example, 签订了一项协议 means "signed an agreement."
两家公司签订了为期五年的合作协议。
Liǎng jiā gōngsī qiāndìng le wéiqī wǔ nián de hézuò xiéyì.
The two companies signed a five-year cooperation agreement.
买房之前一定要仔细看清再签订合同。
Mǎi fáng zhīqián yídìng yào zǐxì kànqīng zài qiāndìng hétong.
Before buying a house, you must read the contract carefully before signing.
双方代表在北京签订了贸易条约。
Shuāngfāng dàibiǎo zài Běijīng qiāndìng le màoyì tiáoyuē.
Representatives from both sides signed a trade treaty in Beijing.