Top dressing, adding soil and sand that trickle through grass and ground cover plants is not just necessary for proper drainage, but for plant and grass health.
追肥，增加土壤和沙，通过种草，地面覆盖植物涓滴不只是适当的排水必要的，但工厂和基层健康。
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The wood strips are placed on top to provide a drainage plane so moisture doesn't get behind the siding.
该木条放置在顶部的飞机，以便提供一个排水水分没有得到背后的壁板。
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