obligation
n. （法律上或道义上的）义务，责任；恩惠，人情债；（承诺付款等的）合同，契约；必须要做的事情
复数 obligations
例句
We have a moral obligation to protect the environment.
我们有道义责任保护环境。
《牛津词典》
She did not feel under any obligation to tell him the truth.
她觉得没有义务告诉他实情。
Governments have at least a moral obligation to answer these questions.
政府至少在道义上有责任回应这些问题。
