If you need anything, I am at your service.

您要是需要什么，请尽管吩咐。

《牛津词典》

C: Always at your service.

诚心为您服务。

youdao

You'll save money, feel happier, and have theworld at your service.

这样省钱，感觉会更幸福，而且世人也愿为您效劳。

youdao

For people who do have Internet connections, and are motivated, there are informative Web sites at your service.

NPR: It's Easy to Miss the Memo on Product Recalls

Bottom line: if precision matters, download the app from the official weather service at your destination, where available.

BBC: The best weather apps for travellers

"This is a symbol, it is a sign washing your feet means I am at your service, " Francis told the youngsters.

NPR: Pope Washes Feet Of Young Detainees In Ritual