例句與造句

1. by doing single fracture drainage experiments, this paper has successfully presented the logarithm function relationship between ratio of drainage discharge through upward and plumb drainage hole and the ratio of their equivalent diameters . the drainage effect will be the best when the included angle between drainage hole and fracture surface is 21 ~ 36
   4、通過單裂隙排水試驗，建立了傾斜孔和垂直孔的排水量之比與其交界線的等效直徑比之間的自然對數(shù)關系式，排水孔排水量基本隨其與裂隙面的交角減小而增大；對單組裂隙排水的初步分析表明，排水孔與裂隙面的夾角在21~36范圍內排水效果最佳。
2. It's difficult to find logarithm function in a sentence. 用logarithm function造句挺難的