您好,可以参考以下翻译:
Please pull the clothes' zipper down.
请把衣服的拉鍊拉下来。
Pull the zipper of the clothes down please.
把衣服的拉鍊拉下来,麻烦您。
Please slipping the zipper of the clothes down.
请拉开衣服的拉鍊。
当然,楼下那位知友回答的也没错,明确一点的拜托他人帮忙的话,一般是这麼讲:
Could you please unzip the dress for me?
能否请您帮我拉开衣服(裙子)的拉鍊吗?
Please unzip the clothes for me, thank you!
请帮我拉开衣服的拉鍊,谢谢!
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