But most distance test systems have the weaknesses of poor scalability and maintainability.

然而大多数现有的远程考试系统存在可扩展性差、难以维护的缺陷。

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The launch system USES ultrasonic echo and reflection of the time difference to measure the distance test.

该零碎应用发射超声波与反射回波时间差来测量待测间隔。

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The method maximizes compensation of system error and the main miss distance test error comes from the test accuracy of the radar itself.

本方法可最大限度地补偿掉系统误差，脱靶量测量误差主要来源于雷达本身测量精度。

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The MP4-18 also failed to complete a race distance at a private test in Barcelona.

BBC: McLaren target Silverstone

All-rounder Watson has come in for some criticism recently but provided the perfect riposte with an unbeaten 96 to leave him within touching distance of his first Test century.

BBC: Final wicket stand lifts West Indies against Australia

And Mr Prodi's apparent success in bringing Italy within shouting distance of the Maastricht test has numbed his right-wing opponents, most of whom approve of the government's euro ambition but have derided its efforts to achieve it.

ECONOMIST: Italy