So I don't want to round-trip the entire form to server just to validate a single field, or download the thousands of possible airport IATA codes to the client each time.

所以，我不希望只是为了验证一个单个字段要在服务器间往返通信整个表单，或者每次都需要将数千个机场的 IATA 编码下载到客户端。

youdao

If nobody else has updated the dispenser object in the meantime, our later updates will only cost a single round-trip.

如果没有其他人同时更新分发器对象，我们随后的更新仅需一次循环。

youdao

All of that seems to add up to a single, reliable, and predictable update to WjcCounter per client round-trip to the CE server.

所有这些结合起来似乎能够在每次循环经过CE服务器时都能够对WjcCounter进行一次可靠的、可预测的更新。

youdao

To date, the Ministry of Commerce has yet to grant a single round-trip investment approval under the 2006 rules.

WSJ: Scott A. Jalowayski: A Private-Equity Boost for China

The two nuclear-capable planes flew from Whitman Air force Base in Missouri to South Korea as part of a "single, continuous" round trip mission during which they dropped "inert munitions on the Jik Do Range", the statement said.

BBC: US B-2 stealth bombers in South Korea drill

If humans ever do go to asteroids or Mars, the scale of the infrastructure needed to complete a safe round trip could not possibly be launched on a single rocket from Earth.

BBC: Manned flight around Moon considered