That was an unreasonably long scan time and in the case of CT entailed very high exposure to radiation.

那时候扫描时间十分漫长，而且在CT检查时高暴露于放射线。

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Too many columns in a table can make the scan time for queries much longer than if there are just a few columns.

一个表中有太多列比仅有一些列时进行查询所需的扫描时间要长。

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In this paper, a circular-scan time analyzer to be used in the satellite laser ranging system with ranging accuracy of submillimeter, has been developed.

在本文中，我们设计并研制了用于毫米级精度人卫激光测距的圆扫描时间分析系统。

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The quick scan time and narrow probe head tip, also offer the possibility for a full body scan of multiple suspicious lesions in a single patient appointment.

FORBES: Early detection is your best defense.

You can get a one-time scan of most ports free, and more thorough scans for a sliding fee.

CNN: Symantec offers Web-based PC checkups

Crist said he hopes to have all the state's touch-screen machines replaced by optical scan systems in time for next year's presidential election.

NPR: Florida Move Would Back Up Electronic Voting