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。

youdao

A single scan is unlikely to tell you everything you need to know.

一次扫描不可能获得您所需要的所有信息。

youdao

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。

youdao

But in many cases, the diagnosis was made on the basis of a single ultrasound scan - which, according to independent doctors, cannot justify a decision to operate.

BBC: The Indian women pushed into hysterectomies