These are captured periodically (the product manuals recommend every 12 hours) and imported into a local database.

系统定期捕获这些证书(产品手册建议每12个小时捕获一次)并导入到一个本地数据库中。

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The spacecraft will orbit about once every 12 hours and fill in the visual gaps left by it's two earlier flybys and the images snapped by Mariner 10 between 1974 and 1975.

它每十二小时绕水星一周，将填补早先它两次飞掠和水手十号1974、1975年照片的视觉视角。

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Officials said the miners were clearing about eight tons of rock every 12 hours to keep the mine shaft clear.

CNN: STORY HIGHLIGHTS

Dairy cows produce milk for 10 months after they give birth to their calves, and they must be milked every 12 hours.

FORBES: Why Milk Isn't As "Natural" As You Think

The intended patient, Woody, another of her six rescued Bassets, was supposed to take half of a chewable, flavored tablet every 12 hours.

WSJ: When Pills and Medicines Get Into the Wrong Paws