In the system the period of the scanning current is completely synchronized by the major pulse of the modulator in order to avoid the beat.

系统的扫描电流周期和调制器的主脉冲同步，可消除扫描均匀性中出现的拍频现象。

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An STM works by applying a voltage between the microscope's tip and the material it is scanning, and then monitoring the change in current.

扫描隧道显微镜(STM)的工作方式是把电压加到显微镜探头尖端与被扫描物体这两端，然后检测电流变化。

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But current checking methods, generally involving laser scanning, are expensive and require lengthy set-up.

但是，目前的检测方式通常都是使用激光扫描，这些方式都价格昂贵并需要长时间的设定。

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Specifically, the phone maker will begin scanning all current and future BlackBerry World apps with the Trend Micro Mobile Application Reputation Service, a cloud-based solution that'll exist alongside BlackBerry's current security measures.

ENGADGET

The old horizon scanning function really has become a much more complex, dynamic, and rewarding activity in the current era.

FORBES: IBM100 'THINK' Draws History Lessons For The Future

Caught in the middle is GE's medical division, the old home of current chief Jeffrey Immelt and the biggest seller of X-ray, MRI, ultrasound and CT-scanning equipment in the world.

FORBES: Cranking Up the Volume