That lead to a few calls in early 2008 to discuss this problem. Monitoring is difficult for several reasons.

这促使我们在2008年初多次讨论这个问题。

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Moving loads identification is one of the important measures for health monitoring of bridge because the cyclic action of moving loads may lead to fatigue damage or even failure of the bridge.

移动车辆荷载反复作用会导致桥梁疲劳损伤甚至破坏，移动荷载识别是桥梁健康监测的重要措施之一。

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The study selected Urumqi City 4 representative path for monitoring points, for the TSP consecutive year low of the sampling and TSP and the lead for analysis.

本研究选定乌鲁木齐市的4条具有代表性的道路为监测点，对低空下的TSP连续进行一年的取样，并对TSP及其中的铅进行分析。

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But they are also believed to carry out large-scale routine monitoring of communications, which searches for trigger words that might (for example) lead investigators to drug smugglers or terrorists.

ECONOMIST: Those perfidious Anglo spies