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As an additional safeguard against weeds you can always use an underlay of heavy duty polyethylene.
作为另外一种预防杂草的防护措施,你可以一直使用一层厚重耐磨的聚乙烯底垫。
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The leaflet explains how to safeguard against dangers in the home.
小册子告诉人们在家里如何防备各种危险。
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They safeguard against cancer.
他们能抗癌。
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Safeguard against Settings change.
保卫对抗设定变化。
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Keeping clean is a safeguard against disease.
保持清洁是抵御疾病的防护措施。