Water Guard prevents water absorption, algae growth, efflorescence and is also UV resistant.

它可防止水份吸收、藻类生长、风化，也能抗防紫外线。

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The active compound of Water Guard penetrates into the pores of concrete, mortar, precast concrete slab, SLATE, brick tile, masonry, timber, etc.

其活性化合物能渗入混凝土、砂浆、预制混凝土板、石板、砖瓷、石材、木材等的微孔。

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Some of it became entrained with sand and the sediment coalesced into mats that will stay submerged until they are weathered by the water or spotted by the Coast Guard.

应该有部分原油渗入沙中，并和沙一起沉淀最终合成一体。 它们在被水风化或被海岸巡逻队探测到之前都会淹没在水中。

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The project is intended to give the authorities the ability to draw water from the Colorado River for the Las Vegas area and guard against water quality issues that are associated with continually dropping lake levels.

CNN: STORY HIGHLIGHTS

It is hard to protect shopping malls or guard water supplies everywhere.

ECONOMIST: Tense times at home

The Texas National Guard sent a water purification team to the West End.

CNN: Officers from across the country join forces in New Orleans