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Rebecca Winchester, a spokeswoman for the Memphis Zoo, said the panda had a genetic condition that affected her immune system and made her fur look patchy. And at 190 pounds, she said, Ya Ya is naturally on the smaller side.

When Ya Ya paces in her enclosure — another detail that alarmed people on social media — she is likely exhibiting the hormonal influence of estrus, which female pandas undergo once a year, Ms. Winchester said.

“It is heartbreaking to have an entire narrative out there,” Ms. Winchester said when asked about the criticism. “First of all it is hard to control. You don’t speak the same language, and it is not easy to travel to Memphis and see her with their eyes.”.

生词短语：

genetic condition

遗传特征

immune system

免疫系统

patchy

分布不匀的; 不完整的

enclosure

圈占地;圈用地;围场

estrus

发情，发情期

narrative

叙述; 描述

speak the same language

兴趣、意见、观念相同