I know of only one duty, and that is to love.

我只晓得一个责任，那就是施爱。

youdao

I know only one duty, and that is to love.

我知道一种责任，那就是爱。

youdao

I know of only one duty and that is to love.

我只知道一个责任，那就是施。

youdao

But I ask the honorable senators whether their duty will be done by simply limiting themselves to opposing any one or all of the resolutions I have offered."

VOA: special.2009.03.19

There is one military aid on duty every second of every day including overnight.

所以每天每秒钟,包括整一个晚上,都有一个军事助理值班。

普林斯顿公开课 - 国际座谈会课程节选

It is not a regime like ours devoted to maximizing individual liberties, but it is one that puts the education of its citizens, the education of its members, as its highest duty.

那不像我们的政体,只专注于极大化个人自由，而是一个,将公民教育，邦内成员教育，视为最高责任的理想国。

耶鲁公开课 - 政治哲学导论课程节选

However, there is one festive duty the crew is happy to take part in - providing cover for the town's annual Boxing Day charity dip.

BBC: Redcar RNLI hopes for quiet festive period

As one whose duty it is to ensure children are protected from abuse, I would caution my European colleagues to study these issues intensely before adopting their own wide-ranging registries.

ECONOMIST: Protecting children

U. duty one recent evening, and he ran through his list of patients with me.

NEWYORKER: Letting Go