There may be more than one OK button in existence when you call the find method.
当您调用find方法时，可能会存在一个以上的OK按钮。
If you specify one button, the alert displays an OK button.
如果你指定一个按钮，提醒只显示一个确定按钮。
The 'companion' can then track the phone's GPS to see where their loved one is at any time, while the app will periodically show a button on the user's home screen asking 'Are you OK?
然后这位“同伴”就可以跟踪手机的GPS随时了解他们爱的人所在的位置，而同时应用会定时在用户的主屏幕上显示一个按钮，询问“你还好吗？” 。
We are going to create two test methods, one for testing the OK button, and the other for testing the Cancel button.
我们将创建两个测试方法，测试确定按钮之一，是检验取消按钮等。
Stewardess: Let me help you. OK, this is the one you want. Push this button to change the channel. We have 6 channels in all. Have a good day.
空姐：我来帮您。好了，这个就是。按这个按钮换台o目前我们总共有6个频道。祝您开心。
Stewardess: Let me help you. OK, this is the one you want. Push this button to change the channel. We have 6 channels in all. Have a good day.
空姐：我来帮您。好了，这个就是。按这个按钮换台o目前我们总共有6个频道。祝您开心。
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