请问各位楼主这个回归分析的拟合度为71.1%是不是太低了啊

The regression equation is
含硅量 = 3.35 - 0.00339 煤比 - 0.00231 风温


Predictor Coef SE Coef T P
Constant 3.3476 0.4693 7.13 0.000
煤比 -0.0033865 0.0008462 -4.00 0.000
风温 -0.0023143 0.0005005 -4.62 0.000


S = 0.0559254 R-Sq = 71.1% R-Sq(adj) = 69.9%


Analysis of Variance

Source DF SS MS F P
Regression 2 0.36153 0.18076 57.80 0.000
Residual Error 47 0.14700 0.00313
Total 49 0.50853


Source DF Seq SS
煤比 1 0.29465
风温 1 0.06688


Unusual Observations

Obs 煤比 含硅量 Fit SE Fit Residual St Resid
8 101 0.58100 0.67275 0.02590 -0.09175 -1.85 X
10 126 0.62200 0.55338 0.02398 0.06862 1.36 X
34 117 0.67100 0.53063 0.01341 0.14037 2.59R
49 119 0.68700 0.55857 0.01820 0.12843 2.43R

R denotes an observation with a large standardized residual.
X denotes an observation whose X value gives it large influence.

请问各位楼主这个回归分析的拟合度为71.1%是不是太低了啊
可以看作是显著么 ???