"Ten acres of light smoke flying crane autumn" and "ten acres" represent a vast space, while "light smoke" describes the natural feeling of this space. "Autumn" indicates the season and conveys the flow of time. "Flying crane" symbolizes freedom and leisure. Generally speaking, this sentence expresses the scene of cranes flying freely in the vast space of nature in autumn, which implies the author's yearning for such freedom and leisure.
In A Curtain on a Cool Moon Night in Hengqin, a curtain refers to a hanging curtain or a door curtain, while a cool moon depicts a cool and pleasant night under the bright moonlight. "Night" means time, and "Hengqin" means playing the piano. This sentence depicts the author playing the piano in front of the window in the moonlight on an autumn night, conveying a quiet and elegant atmosphere.
Generally speaking, this pair of couplets expresses the author's yearning for freedom and leisure life, and his feeling of enjoying a quiet and elegant life in autumn night.