To reduce and eliminate the damage and losses of all kinds, Sichuan Province must adopt comprehensive prevention and remedy measures of water-retaining, cultivation-changing and forestation.

为了减少或消除干旱所造成的各种危害和损失，四川必须进一步采取蓄水、改种、兴林等综合配套的防治措施。

youdao

So water-retaining agents could mix urea and low concentration potassium in process of production, and we can study complex water-retaining agents which compose the nitrogen and potassium too.

因此，在生产过程中可以考虑保水剂与尿素和低浓度的钾肥混合施用，也可以进行赋氮肥、钾肥的复合型保水剂研究。

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This water retaining agent is low in cost, good in properties and it is a mortar admixture of good economic benefit.

此种保水剂成本低，性能好，是一种经济效益很好的砂浆外加剂。

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Restoring the water-retaining capacity of hydro-electric dams by regular dredging and sand and silt removal is the only way left before the authorities.

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