flat saddle 中文意思是什麼
flat saddle
解釋
平鞍-
The space geometry is open and negatively curved as a saddle. if the density equals to the critical density exactly, the space is flat as a sheet of paper. if the density is greater than the critical density, the space geometry is closed and positively curved as a ball
為負馬鞍形的開放宇宙假若密度和臨界密度相等，空間曲率為零，宇宙如一張白紙般平坦假若密度高於臨界密度，它則是一個空間曲率為正球形的封閉宇宙。 -
It is set up the equipment adjusted and has such function : flat and saddle stitching
它設有校車調整裝置，具有平訂或騎馬訂功能。 -
If you can put both feet flat on the ground then the cycle is too small or the saddle too low giving a cramped riding position
如果騎著單車而雙腳能平放在地上，則表示單車過小或鞍座過低，騎單車者因而要屈膝遷就。
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