obligation

The firm must fulfill its obligations under the contract. = The firm must fulfill its contractual obligations.公司必须履行合同所规定的义务。

legal/financial/constitutional obligations法律/财政/宪法义务

Both landlord and tenant should know their rights and obligations. [=responsibilities]房东和房客双方都应该了解自己的权利和义务。

You can try the machine for free without obligation. [=without being required to buy it or to do anything else]你可以免费试用这台机器，不是非买不可。

You are not under any obligation to stay. [=you are not required to stay]你没有义务必须要留下。

You're under no (legal) obligation to return the money. [=there is no law that requires you to return the money; you do not have to return the money]你没有（法律上的）义务偿还这笔钱。

family/social obligations家庭/社会责任

She believes that all people have a moral obligation to defend human rights.她认为所有人都有道义上的责任去捍卫人权。

He argues that people in a community have certain obligations to each other.他争辩说一个社区里的人们对彼此都有一定的义务。

She failed to fulfill her obligations as a parent.她没有尽到做家长的责任。

We visited them out of a sense of obligation. [=a feeling that it was the right thing to do]我们出于道义拜访了他们。