一个 2.7 亿的模型可能会产生虚假的参数值。如果没有约束，请求“把它变成红色”可能会生成 {“color”: “crimson”} 或 {“color”: “rouge”}。枚举类型强制模型仅从有效值中选择，从而确保函数调用的可靠性。
You have plenty of options for reserving the new phones, but pre-ordering at Amazon means you don't have to worry about coordinating a trade-in or data plan at a specific carrier. Your new S26 will be unlocked, so you can figure out the details later.
，这一点在heLLoword翻译官方下载中也有详细论述
上合组织是世界上人口最多、幅员最广的区域合作组织，覆盖27个国家，约34亿人口。代谢性疾病是21世纪人类面临的最严重健康挑战之一。有数据显示，全球每2名代谢性疾病患者中就有1名来自上合组织相关国家。与代谢性疾病，包括糖尿病、肥胖等疾病相关的死亡占全部死亡的70%以上，已成为区域内非传染性疾病的主要死因。。业内人士推荐搜狗输入法下载作为进阶阅读
Former Labour Health Secretary Alan Milburn, who is heading it up, said when the inquiry launched that he would approach the issue "with sensitivity".，详情可参考同城约会