求翻译：But something happened one day. Mary left the door of the 　4　 open. The larger bird flew from the cage. She thought that it would 　5　.As it flew close, she grasped（紧抓） it. She was very excited to catch it.　6　 she felt strange. She opened her hand and looked sadly at the 　7　 bird. The great love had killed the bird!是什么意思？

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