return (float)rand() / RAND_MAX;
劉亮說，今年的農曆新年不會離開舊金山，但妹妹及妹夫會特地從洛杉磯過來，與他一起過年。
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第四十八条 省级以上公安机关、网信部门等有关主管部门可以对网络暴力事件的受害者发布网络保护令。
When the star eventually releases its outer layers, it shrivels down to its core in what's known as a white dwarf star. At that point, it'll be about the size of Earth.