Essentially, ping sends an echo packet to the device, and expects the device to echo the packet contents back.

简单地说，ping向设备发送一个echo数据包，期望设备把数据包的内容发送回来。

youdao

He went up to the mountains and shouted, "I hate you, I hate you," and back came the echo "I hate you, I hate you." This was the first time that he had heard an echo.

他爬到山上大声喊：“我恨你，我恨你”，就听见回声“我恨你，我恨你”，这是他第一次听到回声。

youdao

The algorithm USES an adaptive filter to track the echo path, and an auxiliary filter to cancel the echo together with the adaptive filter.

该算法使用自适应滤波器跟踪回声信道，使用一个辅助滤波器和自适应滤波器一起完成回声消除。

youdao

As the president continued his cross-country appeals on health care reform, partisan disagreements continued to echo on Capitol Hill.

VOA: standard.2010.03.10

But the point that I was trying to make was simply that -- and, again, to echo a little bit about what Secretary Gates said, we have -- we obviously have 68, 000 troops there.

WHITEHOUSE: Press Briefing

Criticism of how business schools may have helped create the end of the business world as we know it would seem to echo Gordon-Howell's point about the need for more emphasis on ethics.

ECONOMIST: The Gordon-Howell report of 1959

Bringing fish and seafood from the quay via auctions and wholesalers in curved rows of warehouses through to the end-buyers, it is the last echo of a Tokyo whose loss the governor seems to mourn.

ECONOMIST: Gems of the ocean