iPhoneXS MAX/11Pro iPhoneX/XS/11ProMax iPhoneXR/11 iPhone8/7/6s/6 Plus iPhone8/7/6s/6 iPhone5s/5c/5 iPhone4s/4
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URL：https://upload.wikimedia.org/wikipedia/commons/thumb/9/93/Placentation.svg/440px-Placentation.svg.png 掲載元：https://zh.wikipedia.org/zh-hk/雙胞胎
