你可以查阅若干参考数据，包括供水系统中一些化学药品和物质的列表，这些或许对斑马贻贝在各个水系的扩展产生影响。
You will have access to some reference data to include listings of several chemicals and substances in the water system that may affect the spread of the zebra mussel throughout waterways.
煤灰含有有毒的重金属，包括砷、镉、水银和铅，这些会从供水系统中过滤处理，在有风的时候吹到空中。
Coal ash contains toxic heavy metals, including arsenic, cadmium, mercury and lead, which leach into water systems and get blown into the air during windy days.
民用计算机基础设施包括计算机网络，比如可能控制着空中交通管制系统或者供水系统。
The civilian computer infrastructure would include the networks that control an air traffic control system or a water supply, for example.
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