window.innerWidth / window.innerHeight 是长宽比，保证画面不变形。
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此前，iPhone 拍照以太直白、太平淡，没什么个性也没什么风格闻名，并由此得到个很贴切的外号——白开水。，更多细节参见同城约会
Two years in, he gambled and switched to the Navy Academy at Annapolis, on Chesapeake Bay, in the hope of working with his beloved rockets.