Latency is the amount of time (usually measured in milliseconds) that a packet of data takes to get from one point to another and then back in a round trip.

延迟是数据包从一个地点到另一个地点然后返回这一个来回所花费的时间(通常以毫秒计)。

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The SLA should specify an average round-trip latency and packet loss over a given time period — within a month, say.

SLA应该指定给定时间周期(假设一个月)内的平均来回延迟和数据报丢失。

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The time taken for this round-trip of request and acknowledgment determines the network's latency.

就是因为这种往返的要求和回应，导致了网络的延迟。

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Conversely, Amazon EC2 is always connected to the backbone of the internet where round-trip latency is 5 milliseconds or less to most web sites rather than the 100 milliseconds seen over wireless connections.

ENGADGET: Amazon Silk browser spins a faster mobile web, courtesy of cloud servers (video)

The time taken for this round-trip of request and acknowledgment determines the network's latency.

ECONOMIST: The faster the internet becomes, the slower it loads pages

Latency over wireless connections is high - on the order of 100 milliseconds round trip.

ENGADGET: Amazon Silk browser spins a faster mobile web, courtesy of cloud servers (video)