By picturing one layer of the body's tissues at a time, ct scanners can detect very small tumors and other disorders.

通过一次只拍下身体组织的一个断层，计算机断层扫描仪能侦察到很微小的肿瘤和其它病变。

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Each time a new virus, or a new viral approach is discovered, anti-virus scanners must be updated.

每当一个新的病毒，或一种新的病毒工作方法被发现，必须更新反病毒扫描程序。

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Fingerprint scanners and devices that generate time-specific codes offer greater security, but they require hardware.

ECONOMIST: Online security

Now, when inventories fall below a certain level, the checkout scanners instantly order a new batch based on historical demand and delivery time.

FORBES: Street Smarts

At the time, republican sources said they hoped the move would make it easier for scanners to be introduced if the trials were successful.

BBC: Scanners ruled out for NI prison searches after pilot