There is a special marked fold on the anterior end that relates to the development of digestive system, hereditary, and other factors.
有特殊折叠，折起的形成可能与消化系统发达、遗传发育等因素有关。
There is a special marked fold on the anterior end that relates to the development of digestive system, hereditary, and other factors.
有特殊折叠，折起的形成可能与消化系统发达、遗传发育等因素有关。
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