Experts say it is important to keep large farm animals away from water supplies with the use of a fence or barrier.
专家称，必须使用栅栏和篱笆使大型农田动物远离水源，这是非常重要的。
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Objective:To establish an in vitro human pseudo-epidermis model with epidermis-like water permeation barrier function.
目的：建立具有正常皮肤样水渗透屏障功能的人拟表皮模型。
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Biax-orientation Nylon6(BOPA) film is a new type of top grade packaging material with outstanding properties including cold-proof, heat-proof, oil resistance and good gas, water vapor barrier etc.