n.義務(wù)；責(zé)任

We are invited, but we are under no obligation to go. 我們是被邀請(qǐng)了,但并不意味著我們有義務(wù)一定要去。

Some people suggest that the old people's children have the obligation to look after their old parents. 一些人認(rèn)為：老年人的子女有義務(wù)照看他們的父母。

n.義務(wù)

名詞obligation的復(fù)數(shù)形式.