For a completely secure patch, use a sewing machine or a needle and thread to secure the patch to the fabric. This greatly reduces the chances that the patch will fall off.  Choose a thread that matches the patch. Don't attempt to sew around the edge of printable paper patches. Iron-on patches are meant to be permanent, but they do become loosened over time. Take care not to let the article get too dirty, since washing it may cause the patch to start coming off. If you do need to wash the item, hand wash it using cold water. Allow it to air dry.

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Write a summary of the previous text in Chinese:
可以考虑用线把补丁贴的边缘缝起来。 衣物不要洗得太勤。