当使用者选好要上载的档案并送出页面时，会将档案当做要求的一部分上载。
When users have selected a file to upload and then submitted the page, the file is uploaded as part of the request.
当使用者选好要上载的档案并送出页面时，会将档案当做要求的一部分上载。
When users have selected a file to upload and then submitted the page, the file is uploaded as part of the request.
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