The 6.5-foot water walking balls contain about 90 minutes worth of oxygen, he said.

他说，这些直径为6.5英尺的水上步行球内含可以使用90分钟的氧气。

youdao

You can now discover a recipe for the Elixir of Water Walking with Northrend Alchemy Research.

你可以使用诺森德炼金学研究学习到水上行走药剂的配方。

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Walking along the river bank one day, I found a child struggling in the water.

一天，我沿着河岸散步，发现一个孩子在水里挣扎。

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This can be anything from walking or running against the resistance of water, to doing jumping jacks in the water.

VOA: special.2010.06.08

Zach decided to help victims by walking around his area with his little red wagon collecting and giving out bottles of water.

VOA: special.2009.07.31

Mutesi wakes at 5 a.m. every morning to "begin a two-hour trek through Katwe to fill a jug with drinkable water, walking through lowland that is often so severely flooded by Uganda's torrential rains that many residents sleep in hammocks near their ceilings to avoid drowning, " he wrote.

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"If I could do it again, I would tone the water stuff down some buyers who looked at the house didn't like the feeling that they were walking on water, " says Mr. McKinney.

WSJ: A River Runs Through��the Home

The marathon, road cycling, triathlon, open water swimming and race walking are the events most at risk.

BBC: Rogge admits Beijing air concern