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。
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。
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。
Conclusion: in 3d-flash sequences, water excitation technique as an alternative to fat suppression can shorten scan time significantly, without decreasing image quality.
结论：3d -FLASH序列合用水激发技术代替脂肪抑制可显著缩短扫描时间，而不降低图像质量。
Considerable and valuable time could be spent sorting through a lot of old information to find the current information, either manually or with tools used to scan all the files.
可能要花费大量宝贵的时间对许多旧的信息进行排序(手动进行排序，或者使用扫描所有文件的工具)，以找到当前的信息。
Most often, you want only a small subset of the data in the table, so a full table scan wastes a lot of disk I/O and therefore time.
通常来说，您可能只希望获得表中数据的一个子集，因此全表扫描会浪费大量的磁盘I/O，因此也就会浪费大量时间。
Sellers can also use the scanning technology to scan an item and list the product in very little time.
卖家也可以使用该扫描技术来扫描商品以便在非常短的时间里列出该商品。
The less decimals, the less time it takes to scan and understand the data.
小数位越少花在扫描和理解数据上的时间就越少。
They would be able to scan larger packet chains in the same amount of time, but that in turn would simply expand the window a little bit, creating yet more work for each new option to be processed.
更快的处理器在同样的时间内会扫描更长的包链，但这样也会造成窗口略微增加，这使得对每个需要处理的新选项的工作量增大。
It minimizes false positives and makes results easy to understand as a higher priority than increasing the breadth of a scan: this helps developers uncover issues early only as long as it saves time.
它将假阳性因素最小化，使结果更加容易理解，从而比增加监测幅面有更高的优先权：这样有助于帮助开发人员尽早发现问题，并且节省了时间。
After all, why bother wasting time installing 2d scanning software when there are no 2d codes to scan.
当没有2d条码浏览器的时候，还有什么理由要花费时间来安装2d浏览软件呢。
As described earlier, a single pass of either the host or port scanning information is only useful for the instant in time when the scan was executed.
如前所述，如果只进行一次扫描，那么主机或者端口扫描信息仅在执行该次扫描的时候是有用的。
Often, when you are searching the Internet, you're looking for a quick answer to a question right at hand, and you don't have time to scan thru a bunch of search results just to find it.
经常地，在你搜索互联网的时候，你是没有时间扫描一大堆的搜索结果的，需要马上得到问题的快速回答。
The AIX page replacement daemons scan memory a page at a time to find pages to evict in order to free up memory.
AIX分页替换守护进程一次扫描内存的一个分页，找出要回收的分页以释放内存。
Owen damaged his hamstring in the Carling Cup final victory over Aston Villa at Wembley last Sunday and a scan has shown that the damage is more serious than was believed at the time.
欧文是在上周日对维拉的联赛杯决赛中拉伤了他的肌腱的。 初步的扫描显示伤情要比最初的预想更加严重。
This sonar can scan thousands of square kilometres of the shallow-shelf seas at one time and see schools of fish moving within them.
这种声纳能一次扫描几千平方公里的浅海区，发现其中的鱼群。
Here we are using the two indexes, and we have the same predicate, this time on the index scan numbered 3 in the plan.
在这里我们使用了两个索引，并且有同样的谓词，这一次针对计划中编号为3的索引扫描。
He spends much of his time running CDs through a glowing, briefcase-size machine - and needs about six minutes to scan a disk and find patterns.
他花费了自己大量的时间通过一台发光的、公文包大小的机器来运行CD，需要大约6分钟来扫描光盘并寻找模式。
The time_id join keys that meet the filter requirements on the Time dimension table are hashed to create a bit vector that filters rows of the Orders table from the skip scan above.
Time维度表中满足过滤条件的 time_id连接键被散列以创建一个位向量，用于过滤以上跳跃式扫描的Orders 表行。
If you forget what images you've added to the collection, you can save time looking for them by going to the Maintenance menu to scan all directories for new images.
如果忘记了已经将哪些图像添加到此集合，可以通过转到Maintenance菜单，扫描所有目录来寻找新图像。
If your application frequently accesses smaller tables without proper indexes, the database will load them into memory each time and scan them.
如果应用程序频繁地访问没有适当索引的小表，数据库每次都会把它们装载进内存并扫描它们。
But if each peasant has to scan her irises every time she picks up her ration, it will be harder to scam the system.
但若每个农民每次领取补贴配给量时，都须扫描虹膜，那么该补贴制度就很难诓骗。
But the Journal found new tools that scan in real time what people are doing on a Web page, then instantly assess location, income, shopping interests and even medical conditions.
日报发现的新工具却可以实时扫描人们在网页上做什么，随即便能估定出位置、收入、购物兴趣乃至医疗状况。
People scan web pages, and probably won't take a long time to read all the text.
人们会快速浏览页面，但可能不会花很长时间阅读所有的文字。
The root or global space is considered empty and each time the module keyword is encountered during a file scan the string ": :" and the identifiers are appended to the name of the current root.
根或全局空间被认为是空的，文件扫描中每次遇到模块关键字时，字符串“：”和其标识都会附加到当前根的名称后面。
At the same time, the researchers observed what was going on inside the mind using a type of brain scan called functional magnetic resonance imaging.
让她们进行一项电脑测试，对答对者可获得一定酬金。同时，研究者们利用磁共振脑功能扫描观察她们的大脑内部状态。
Replacing Spaces with commas and vice versa can be done in a single scan over the string, and the control characters are injected at the same time.
只需对字符串扫描一次，就可以用逗号替换空格，反之亦然，同时还可以加入控制字符。
Replacing Spaces with commas and vice versa can be done in a single scan over the string, and the control characters are injected at the same time.
只需对字符串扫描一次，就可以用逗号替换空格，反之亦然，同时还可以加入控制字符。
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