Computers cache the name-to-IP mapping for a certain period of time, known as the time to live (TTL), to reduce overall response time.

计算机将这个名称缓存到IP映射一段时间，这个时间段称为time to live (ttl)，以减少总响应时间。

youdao

For instance, the inventory response for the parts from an automotive dealership includes a Time-To-Live (TTL) element.

比方说，汽车零售商的零件目录响应中包含一个Time - To - Live (ttl)元素。

youdao

Below is an example of setting the TTL value to 120 seconds for key "a, key."

下面是为键“ a, key ”设置ttl值为120秒的示例。

youdao

The camera also features a Nikon 1 i-TTL hot shoe port, affording the use of optional lighting and camera accessories with the Nikon 1 V2.

ENGADGET: Nikon 1 V2 unveiled: 14.2 megapixel ILC shoots 15fps stills for $899.95 in November

Other differences between the FZ30 and FZ50 include the addition of SDHC card support, a TTL Flash hot-shoe, 16:9 shooting mode, and the so-called Venus Engine III image processor, but the elimination of TIFF file support and several thousand pixels from the 2.0-inch LCD.

ENGADGET: Panasonic's Lumix DMC-FZ50 10 megapixel shooter