天低吴楚，眼空无物

the sky hangs low over the Yangtze, empty as far as the eye can see (idiom); nothing to see to the broad horizon

day / sky / heaven

low / beneath / to lower (one's head) / to let droop / to hang down / to incline

surname Wu / area comprising southern Jiangsu, northern Zhejiang and Shanghai / name of states in Southern China at different historical periods

southern states of Wu and Chu / the middle and lower Yangtze valley

surname Chu / abbr. for Hubei 湖北省[Hu2 bei3 Sheng3] and Hunan 湖南省[Hu2 nan2 Sheng3] provinces together / Chinese kingdom during the Spring and Autumn and Warring States Periods (722-221 BC)

distinct / clear / orderly / pain / suffering / deciduous bush used in Chinese medicine (genus Vitex) / punishment cane (old)

eye / small hole / crux (of a matter) / CL:隻|只[zhi1],雙|双[shuang1] / classifier for big hollow things (wells, stoves, pots etc)

empty / air / sky / in vain

to empty / vacant / unoccupied / space / leisure / free time

not to have / no / none / not / to lack / un- / -less

nothing / empty

thing / object / matter / abbr. for physics 物理