Non-linear water wave dynamics and its engineering application become one of the frontier research fields drawing great attention recently.

水波动力学理论研究及其在工程中的应用是现今极受重视的前沿研究领域之一。

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Objective To prevent the spreading of water-born infectious diseases, do effective surveillance on their pathogeny in Zhujiang water at the frontier port area.

目的通过监测口岸辖区内珠江水中水源性传染病病源，有效地预防水源性传染病在国境口岸的传播。

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The Frontier Filter can be used to drink from any water bottle, cup or directly from water sources.

Frontier过滤器可以用于任何瓶或杯子喝，或直接地从水源中喝。

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"That shows a comfort in their own security and power, in that they're happy for something as important as a water resource to be placed north of the frontier, " Dave Macleod, from English Heritage aerial survey team, said.

BBC: Tyne & Wear

When social entrepreneurs deliver power, water, and other goods to poor communities, they create foundations for economic growth, opening frontier markets to other forms of investment.

FORBES: There's More To Fighting Poverty Than Writing Big Checks And Claiming Tax Deductions