Such protection zones shall be divided into first-grade protection zones and protection zones of other grades.

生活饮用水地表水源保护区分为一级保护区和其他等级保护区。

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This paper analysed the causes and proposed a two-grade protection measure. The working program flow chart and logic circuit are designed.

本文分析了原因，提出二级保护的方案，设计了工作程序流程图及逻辑电路。

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Certain water areas and land-based areas near the intakes of domestic and drinking surface water sources may be delineated as the first-grade protection zones.

在生活饮用水地表水源一级保护区外，可以划定一定的水域和陆域为其他等级保护区。

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And then there seems to have been a third hedge taken out, described in today's Wall Street Journal as "protection on investment-grade bonds" - which appears to have been protection against the risk that the second hedge went wrong.

BBC: Does JP Morgan loss show regulators' great failure?

The M5M also features Plextor's True Protect unique enterprise-grade double-data protection technology.

ENGADGET: Plextor trots out M5M series mSATA drives at CES

In line with the needs of advanced users for highest data integrity and confidentiality, the M5 Pro offers a unique enterprise-grade double-data protection technology.

ENGADGET: Plextor M5 Pro bulges SSD envelope with 94K IOPS and 540MB/s