tranquility（）

From the reign of ______________, the Empress moved out of the Palace of Earthly Tranquility.

Once I looked at the moon and caught sight of a strange thing. Here the moon symbolizes homesickness and nostalgic feelings as well as the beautiful and tranquil night.

Poetry is defined by ____________________ as “the spontaneous overflow of powerful feelings, which originates in emotion recollected in tranquility”.

“Emotion recollected in tranquility” is ( )

Tranquil（）