Encircle each screw hole with sealant.
答案解析
解析：
举个生动的例子来帮助理解，就好比我们在做手工艺品时，如果要用螺丝固定两块木板，为了防止木板之间的缝隙导致螺丝松动，我们会在螺丝孔周围涂上胶水或者胶带，这样可以确保螺丝固定得更牢固。密封剂的作用也是类似的，它可以填补螺丝孔周围的空隙，增加密封效果。
相关知识点：
用密封剂环绕每个螺孔
相关题目
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