Yet, it still took until 2011 for emoji support to be universally available with iOS 5, and even then you had to enable the keyboard in settings.
15.3-inch: Liquid Retina, LED, 2,880 x 1,864, 224 ppi
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If you come to a fork in the road, take it，详情可参考PDF资料
readline use readline library for shell (off)