使用者可以刮去表层，得到一串代码，将之发短信去一个指定的号码。
A user can scratch the cover and text it to a designated number.
虽然为了兼容性目的指定主设备号和副号码作为参数是可能的，但不再需要这样了。
While it's possible to specify a major and minor number as arguments for compatibility purposes, this is no longer required.
若本程序并未指定授权版本号码时，您可以选择任一自由软件基金会所发表的版本。
If the Program does not specify a version number of this License, you may choose any version ever published by the Free Software Foundation.
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