当扩展服务因为扩展周期而关闭时，新的功能旗帜被取消激活将会禁用上传按钮同时／或者显示关于关闭时间更为有帮助的消息。
When the external service is down for extended periods, a feature flag can be deactivated that would disable the upload button and/or show a more helpful message about the downtime.
当它们落在你手上之后，它们会从手上传到账单、门把手、电梯按钮和其他物体表面。
When they land on your hands, they are passed from hands to things like bills, door knobs, lift buttons and other surfaces.
这样便为用户提供了一个按钮，用于浏览本地文件系统，并选择上传的文件，如图1所示。
This gives the user a button for browsing the local file system and selecting a file to be uploaded, as shown in Figure 1.
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