国际海事局说，海盗行动涵盖的海域过于辽阔，海军并不能实际覆盖这么广大的地区。
The IMB says the area where the pirates operate is so vast that the navies cannot realistically cover it.
观测网络扩大到实际覆盖的整个地球，测量范围则扩大到涵盖所有传统的、甚至某些非传统的环境参数。
Observational networks were extended to cover practically the entire globe and measurements were expanded to include all traditional and even some non-traditional environmental parameters.
它必须提高目前基本医疗保障的覆盖范围，尤其是要涵盖由独生子女政策造成的老年群体。
It must improve its current rudimentary health-care coverage, not least to cope with the ageing population that is the legacy of its one-child policy.
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