Alexei, the boy that Helen, Will and Ashley bring to the Sanctuary, possesses a symbiotic appendage that is capable of murder. What caused this genetic mutation?是什么意思_Alexei, the boy that Helen, Will and Ashley bring to the Sanctuary, possesses a symbiotic appendage that is capable of murder. What caused this genetic mutation?在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句