1 . But the Earth is not straight ! It has an angle of 23.5 degree.
但是,地球不是平直的,而且有著23.5度的傾斜.
來自互聯網
1 . unflatness
unflaredlanding無拉平的著陸unflatness不平直度unflattenedroll理想剛性輥
2 . concavity
concavesurface 凹曲面, concavity 不平直度, concaveweld 輕型焊縫
