Actually, in the tube engineering, the proportion of the loss of local water head in the loss of pipeline water head is big.

在实际管道工程中，阀门阀道的局部水头损失占管路水头损失的比例是相当大的。

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A mathematical model whose variable is water head can simulate the effects of water head and properties of subsurface irrigation pipe on irrigation.

以压力水头为因变量的数学模型可以模拟供水压力和灌水器特性对灌溉效果的影响。

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Based on the study in the water head area in Changle County, the paper emphasize the significance of protecting the water head area.

在实地考察昌乐县水源地现状的基础上，提出该县水源地保护的意义。

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When his head came out of the water for air, he saw that he was farther away from the soldiers.

VOA: special.2011.05.28

To keep your head above water is a colorful expression that means staying out of debt.

VOA: special.2009.05.10

Hamilton talks about the announcement at GDC, where after the open bar and the trailer, EA trotted out the director of An Inconvenient Truth, a co-founder of Twitter and the head of Charity:Water.

FORBES: Will the New SimCity Be An Environmental Simulator?

She collects drops of water in the vessel she carries on her head, avoiding dirty water, flinging boomerangs at pesky peacocks, jumping over turtles, and avoiding bouncing footballs.

FORBES: A Touch-Screen Game That Wants to Save the World

Indeed, a calculation Dr Ip performed, based on the volume and composition of the urine he collected in the plastic buckets, and of the head-dunking water at the end of each day, suggested that only 6% of the urea excreted by the turtles was leaving them in the traditional manner, via urine.

ECONOMIST: Softshell turtles urinate through their mouths