Hi everybody. Earlier this summer, Michelle, Malia, Sasha and I headed west -- to the national parks at Carlsbad Caverns and Yosemite. And I've got to say, it was a breath of fresh air. We explore
Now when this works, it's because there are large institutions underwriting every 1 or 0 that changes on a computer. 这是因为有庞大的机构来保障电脑程序里1、0之间变化的可靠性。 And when it doesn't, it's often the fault of those l
