首先准备材料：红皮蒜500g、米醋适量。 冻绿蒜的腌制方法： 1、首先准备好红皮蒜和米醋，备用。
I understand that to use the UIActivityIndicator you must start it in the main thread, and then do your long running operation on a background thread. I also understand that all UIKitoperations should
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